72=-7x-4(-x-9)

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Solution for 72=-7x-4(-x-9) equation: 



72=-7x-4(-x-9)

We move all terms to the left:

72-(-7x-4(-x-9))=0

We add all the numbers together, and all the variables

-(-7x-4(-1x-9))+72=0



We calculate terms in parentheses: -(-7x-4(-1x-9)), so:

-7x-4(-1x-9)

We multiply parentheses

-7x+4x+36

We add all the numbers together, and all the variables

-3x+36

Back to the equation:

-(-3x+36)



We get rid of parentheses

3x-36+72=0

We add all the numbers together, and all the variables

3x+36=0

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

3x=-36

x=-36/3

x=-12

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