-31=-7x+3(5x+3)

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Solution for -31=-7x+3(5x+3) equation: 



-31=-7x+3(5x+3)

We move all terms to the left:

-31-(-7x+3(5x+3))=0



We calculate terms in parentheses: -(-7x+3(5x+3)), so:

-7x+3(5x+3)

We multiply parentheses

-7x+15x+9

We add all the numbers together, and all the variables

8x+9

Back to the equation:

-(8x+9)



We get rid of parentheses

-8x-9-31=0

We add all the numbers together, and all the variables

-8x-40=0

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

-8x=40

x=40/-8

x=-5

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