-3=4(r+8)-7

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Solution for -3=4(r+8)-7 equation: 



-3=4(r+8)-7

We move all terms to the left:

-3-(4(r+8)-7)=0



We calculate terms in parentheses: -(4(r+8)-7), so:

4(r+8)-7

We multiply parentheses

4r+32-7

We add all the numbers together, and all the variables

4r+25

Back to the equation:

-(4r+25)



We get rid of parentheses

-4r-25-3=0

We add all the numbers together, and all the variables

-4r-28=0

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

-4r=28

r=28/-4

r=-7

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