-315=-5(7+8x)

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Solution for -315=-5(7+8x) equation: 



-315=-5(7+8x)

We move all terms to the left:

-315-(-5(7+8x))=0

We add all the numbers together, and all the variables

-(-5(8x+7))-315=0



We calculate terms in parentheses: -(-5(8x+7)), so:

-5(8x+7)

We multiply parentheses

-40x-35

Back to the equation:

-(-40x-35)



We get rid of parentheses

40x+35-315=0

We add all the numbers together, and all the variables

40x-280=0

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

40x=280

x=280/40

x=7

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