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

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

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

Khaleesi
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you can make that + (12) just 12. so
3x + 12  4x  12 = 7x + 16
now you gotta combine your like terms

UmarsBack
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x = 7x + 16?

Khaleesi
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3  4 = 1, so your x should be negative
x = 7x + 16
now you have to move the 7x to the left side

UmarsBack
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6x = 16
/6 /6
x=3 ?

Khaleesi
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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

UmarsBack
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7x = 16
7x 7x

Khaleesi
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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

UmarsBack
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Ohh sorry, i get confused when it comes to integers!
8x = 16
8x 8x
x=2

Khaleesi
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that's right! :D

UmarsBack
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Thank you for helping me!

Khaleesi
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no problem :]