3(-7r-3)+8r=-113

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Solution for 3(-7r-3)+8r=-113 equation: 



3(-7r-3)+8r=-113

We move all terms to the left:

3(-7r-3)+8r-(-113)=0

We add all the numbers together, and all the variables

8r+3(-7r-3)+113=0

We multiply parentheses

8r-21r-9+113=0

We add all the numbers together, and all the variables

-13r+104=0

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

-13r=-104

r=-104/-13

r=+8

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