89=-7r-2

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Solution for 89=-7r-2 equation: 



89=-7r-2

We move all terms to the left:

89-(-7r-2)=0

We get rid of parentheses

7r+2+89=0

We add all the numbers together, and all the variables

7r+91=0

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

7r=-91

r=-91/7

r=-13

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