15=-r/8

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Solution for 15=-r/8 equation: 



15=-r/8

We move all terms to the left:

15-(-r/8)=0

We get rid of parentheses

r/8+15=0

We multiply all the terms by the denominator


r+15*8=0

We add all the numbers together, and all the variables

r+120=0

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

r=-120

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