3(7r+9)+8r=-31

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Solution for 3(7r+9)+8r=-31 equation: 



3(7r+9)+8r=-31

We move all terms to the left:

3(7r+9)+8r-(-31)=0

We add all the numbers together, and all the variables

8r+3(7r+9)+31=0

We multiply parentheses

8r+21r+27+31=0

We add all the numbers together, and all the variables

29r+58=0

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

29r=-58

r=-58/29

r=-2

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