-7(-r-3)=2(8+r)

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Solution for -7(-r-3)=2(8+r) equation: 



-7(-r-3)=2(8+r)

We move all terms to the left:

-7(-r-3)-(2(8+r))=0

We add all the numbers together, and all the variables

-7(-1r-3)-(2(r+8))=0

We multiply parentheses

7r-(2(r+8))+21=0



We calculate terms in parentheses: -(2(r+8)), so:

2(r+8)

We multiply parentheses

2r+16

Back to the equation:

-(2r+16)



We get rid of parentheses

7r-2r-16+21=0

We add all the numbers together, and all the variables

5r+5=0

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

5r=-5

r=-5/5

r=-1

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