3(x+-4)=9

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Solution for 3(x+-4)=9 equation: 



3(x+-4)=9

We move all terms to the left:

3(x+-4)-(9)=0

We add all the numbers together, and all the variables

3(x-4)-9=0

We multiply parentheses

3x-12-9=0

We add all the numbers together, and all the variables

3x-21=0

We move all terms containing x to the left, all other terms to the right

3x=21

x=21/3

x=7

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