Mathematics High School

Solve

3x + 8 = 2x + 21

Answers

Answer 1

Answer:

Step-by-step explanation:Simplifying

3x + 8 = 2x + -21

Reorder the terms:

8 + 3x = 2x + -21

Reorder the terms:

8 + 3x = -21 + 2x

Solving

8 + 3x = -21 + 2x

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-2x' to each side of the equation.

8 + 3x + -2x = -21 + 2x + -2x

Combine like terms: 3x + -2x = 1x

8 + 1x = -21 + 2x + -2x

Combine like terms: 2x + -2x = 0

8 + 1x = -21 + 0

8 + 1x = -21

Add '-8' to each side of the equation.

8 + -8 + 1x = -21 + -8

Combine like terms: 8 + -8 = 0

0 + 1x = -21 + -8

1x = -21 + -8

Combine like terms: -21 + -8 = -29

1x = -29

Divide each side by '1'.

x = -29

Simplifying

x = -29

Answer 2

3x + 8 = 2x + 21

3x - 2x + 8 = 21

x + 8 = 21

x = 21 - 8

x = 13

Related Questions

1. The ratio of boys to girls in the 9th grade is 3 to 4. There are 176 girls. Set up a proportion to model this information.

Answers

Answer:132

Step-by-step explanation:

I WILL BRAINLEIST PLEASEMegan earned $4 an hour for babysitting. She earned $16 on Saturday. How many hours did she babysit?

Answers

Answer:

4 hours  

Step-by-step explanation:

16/4= 4

A number r is no less than −1.5 and fewer than 9.5.

Answers

-1.5 ≤ r < 9.5
Sorry if it’s wrong but I’m in 4th grade right now and had to do it on paper.

Find the value of 3x-2 when x=4

Answers

The correct answer is 10! :))

Answer:

10

Step-by-step explanation:

Step 1:

3x - 2             Equation

Step 2:

3 ( 4 ) - 2       input x

Step 3:

12 - 2        Multiply

Answer:

10     Subtract

Hope This Helps :)

Help Me please I hate math:(

Answers

Answer:

What is the question?

Step-by-step explanation: .

Answer:

WHATS THE QUESTION

Step-by-step explanation:

For every pound a company spends on advertising, it spends £0.51 on its website. Express the amount spent on advertising to its website as a ratio in its simplest form.

Answers

Answer:

I think it is 0.51? (I am complety off aren't I/)

Step-by-step explanation:

Find the slope of the line that passes through (8, 9) (6, 12)

Please help

Answers

M=-3/2
Pls mark me brainliest

my sister needs help please

Answers

I believe the answer is -9 3/4. That can also be written as -39/4 or -9.75
i believe its -9 3/4

Jenna has at most $100 to spend on clothes. She wants to buy a pair of jeans for $29 and spend the rest on shirts. Each shirt costs $14. Write and solve an inequality for the number of shirts she can purchase​

Answers

Answer:

5 shirts (read explanation)

Step-by-step explanation:

14x+29=100

14x=71

x=5.1

She can buy 5 shirts

Order the values from least to greatest
|-7|
-2
|-6|
-6
10

Answers

Answer:

-6, -2, |-6|, |-7| 10

Step-by-step explanation:

In the number 4,444.444, how does the 4 in the hundredths place compare to the 4 in the place to its left?

Answers

Answer:

the four to the left of the four in the hundredths place is 1000 place

Step-by-step explanation:

What are the solutions of the equation x2-30=x

Answers

Answer:

x = 6 or x = -5

Step-by-step explanation:

x^2 - 30 = x

x^2 - x - 30 = 0

(x - 6)(x + 5) = 0

x - 6 = 0 or x + 5 = 0

x = 6 or x = -5

8. To which subsets of the real numbers does the number 13 belong?

Answers

Answer:

irrational numbers

Step-by-step explanation:

8.

sqrt(13) is not a whole number, a natural number, an integer, or a rational number.

Answer: irrational numbers

PLEASE HELP ME!!!!!!!!!!

Answers

Answer:

A.)

Step-by-step explanation:

Solve for X.

6(x-1) =9(x +2)

Answers

Answer:

x=-8

Have a wonderful day!!!

I need help with this question

Answers

Answer:

2x-y = 2

Step-by-step explanation:

Answer:

2x-y=2

hope it helps

thank you

on of Tho Mcd
8. Write the standard form of the equation y + 4 = - 12 (x – 1).

Answers

Answer:

12x + y = 16

Step-by-step explanation:

Standard Form: Ax + By = C

Step 1: Write point-slope form

y + 4 = -12(x - 1)

Step 2: Find slope-intercept form

y + 4 = -12x + 12

y = -12x + 16

Step 3: Find standard form

12x + y = 16


Given: AB = CDProve: AC = BD

Answers

Answer:

it would be helpful if there was a diagram but ill write a proof below of how I would solve a problem. however, it may not be what ur looking for as the question is unclear

1) AB=CD - given

2) BC = BC - reflexive

3) AB+BC=CD+BC- addition property of equality

4)AC= BD - substitution

can someone help please i am really confused

Answers

Answer:

so here we are told that angle CED is 39 degrees and in this diagram we have three angles the first one is Angle CED the next one is angle CEL and the last one is angle LED so angle c e l + angle LED is equals to angle c e d so in this case 3 x - 6 + x + 25 should be equal to 39 degrees collect the like terms 3 x + x + 25 - 6 is equals to 39 degrees 4X + 19 is equals to 39 cross the 19 over the equals sign that you have 4 x is equals to 39 + 19 4 x is equals to 68 divide both sides by 4 and x is equals to 17 then substitute replace where there is x with seventeen so in this case angle c e l will be 3 * 17 -6 we are multiplying 3 by 17 because it was 3 x and we got the value of x to be 17 so 3 * 17 is 51 -6 is 45 so angle CEL is 45 degrees you can do the same with the other angle that is angle LED and you get x to be 42

Can somebody helpp ???

Answers

Answer:

X = 2

Z = 95

Step-by-step explanation:

Answer:

Step-by-step explanation:

13x+59=11x+63

13x-11x=63-59

2x=4

x=2

13*2+59=26+59=85

11*2+63=22+63=85

360-85*2=2z

190=2z

z=95

It will be nice if you give me brainliest.Good luck!

Cuanto es [20+(10-15)+2]-[15+(7-10)(-2+5)]

Answers

tansjowkenenejjesnjdhdjdjdjdjjdjdjdhdbdbdbdbdjdjsjeksms

Solve the equation for x: 3x – 2c = 5

Answers

Answer:

3x-2c=5

3x=5-2c

x=5-2c

3

is Gobbledygook a word

Answers

Answer:

Lol that is a word.

11
12 13 14 15
Enter an expression that represents the following statement, and then solve the expression.
3 less than the product of 9 and -5.
The expression is

The value of the expression is

Answers

Answer:

-48 would be the answer

Step-by-step explanation:

product means result of multiplication, so the product of 9x-5=-45 and when it says 3 less than, it means subtraction so we would subtract 3 from -45 which is -48.

Help!
Let f(x)= 7x² + 4x and g(x) = -9x -- 2. What function represents a new function, h(x), for which h(x)=(f+g)(x)
a. h(x)= -2x² + 2x
b. h(x) = 7x2 + 5x - 2
c. h(r)= -2x² + 4x - 2
d. h(x) = 7x- 5x - 2

Answers

Answer:

Option D

Step-by-step explanation:

h(x) = (f+g)(x) = f(x) + g(x)

= 7x² + 4x +(-9x-2)

= 7x² -5x -2

Does anyone know this?? Tysm

Answers

Answer:

D

Step-by-step explanation:

hope this helps

PLEASE HELP!!!!! Match each equation with its slope





(I also have another question like his in my profile)

Answers

Answer: 1. E

2. B

3. C

4. F

5. D

6. A

Step-by-step explanation:

samuel needs to mail a package to his friend in new york. he places an address label with length represented by the function f(x)=3x^3

Answers

Answer:

what is the question

Step-by-step explanation:

help please i only know it starts from "start"

Answers

Answer:

Step-by-step explanation:

Start

Translate up

Rotate counter clockwise

Translate diagonally down

Rotate clockwise

Translate left

What's b/2-14=8 Equal ?​

Answers

Answer:

1. add 14 to both sides

b/2 = 8E + 14

2. multiply both sides by 2

b = (8E + 14) x 2

3. regroup terms

b = 2(8E + 14)

Hope this helped :)

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