12-8=4(2x+9)

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Solution for 12-8=4(2x+9) equation: 



12-8=4(2x+9)

We move all terms to the left:

12-8-(4(2x+9))=0

We add all the numbers together, and all the variables

-(4(2x+9))+4=0



We calculate terms in parentheses: -(4(2x+9)), so:

4(2x+9)

We multiply parentheses

8x+36

Back to the equation:

-(8x+36)



We get rid of parentheses

-8x-36+4=0

We add all the numbers together, and all the variables

-8x-32=0

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

-8x=32

x=32/-8

x=-4

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