-25=-(3r-7)+5(8+3r)

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Solution for -25=-(3r-7)+5(8+3r) equation: 



-25=-(3r-7)+5(8+3r)

We move all terms to the left:

-25-(-(3r-7)+5(8+3r))=0

We add all the numbers together, and all the variables

-(-(3r-7)+5(3r+8))-25=0



We calculate terms in parentheses: -(-(3r-7)+5(3r+8)), so:

-(3r-7)+5(3r+8)

We multiply parentheses

-(3r-7)+15r+40

We get rid of parentheses

-3r+15r+7+40

We add all the numbers together, and all the variables

12r+47

Back to the equation:

-(12r+47)



We get rid of parentheses

-12r-47-25=0

We add all the numbers together, and all the variables

-12r-72=0

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

-12r=72

r=72/-12

r=-6

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