Question

Help, explain step by step.

Answer 1

Solve: 3(x + 4) - 4(x + 3) = 7x + 16.

Answer 2

distribute the 3 and the -4 into the parentheses. what do you get?

Answer 3

3x+12 - 4x + (-12) = 7x +16

Answer 4

you can make that + (-12) just -12. so

3x + 12 - 4x - 12 = 7x + 16

now you gotta combine your like terms

Answer 5

x = 7x + 16?

Answer 6

3 - 4 = -1, so your x should be negative

-x = 7x + 16

now you have to move the 7x to the left side

Answer 7

6x = 16
/6 /6

x=3 ?

Answer 8

no. we have to do the opposite to both sides when moving the 7x to the other side. the opposite of 7x is -7x. so subtract 7x from both sides

Answer 9

7x = 16
-7x -7x

Answer 10

no :/ since we have -x on the left side, we have to do -1x - 7x, which is -8x. so

-8x = 16

now you can divide both sides by -8 to solve for x

Answer 11

Ohh sorry, i get confused when it comes to integers!

-8x = 16
-8x -8x
x=-2

Answer 12

that's right! :D

Answer 13

Thank you for helping me!

Answer 14

no problem :]