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

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



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

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We multiply parentheses

-3r-(5(r+3))-21=0



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

5(r+3)

We multiply parentheses

5r+15

Back to the equation:

-(5r+15)



We get rid of parentheses

-3r-5r-15-21=0

We add all the numbers together, and all the variables

-8r-36=0

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

-8r=36

r=36/-8

r=-4+1/2

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