40-12=4(x-9)

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Solution for 40-12=4(x-9) equation: 



40-12=4(x-9)

We move all terms to the left:

40-12-(4(x-9))=0

We add all the numbers together, and all the variables

-(4(x-9))+28=0



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

4(x-9)

We multiply parentheses

4x-36

Back to the equation:

-(4x-36)



We get rid of parentheses

-4x+36+28=0

We add all the numbers together, and all the variables

-4x+64=0

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

-4x=-64

x=-64/-4

x=+16

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