-7r+3(1+7r)=115

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Solution for -7r+3(1+7r)=115 equation: 



-7r+3(1+7r)=115

We move all terms to the left:

-7r+3(1+7r)-(115)=0

We add all the numbers together, and all the variables

-7r+3(7r+1)-115=0

We multiply parentheses

-7r+21r+3-115=0

We add all the numbers together, and all the variables

14r-112=0

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

14r=112

r=112/14

r=8

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