9x-12=4(7+x)

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Solution for 9x-12=4(7+x) equation: 



9x-12=4(7+x)

We move all terms to the left:

9x-12-(4(7+x))=0

We add all the numbers together, and all the variables

9x-(4(x+7))-12=0



We calculate terms in parentheses: -(4(x+7)), so:

4(x+7)

We multiply parentheses

4x+28

Back to the equation:

-(4x+28)



We get rid of parentheses

9x-4x-28-12=0

We add all the numbers together, and all the variables

5x-40=0

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

5x=40

x=40/5

x=8

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