-3(-7+2r)=9

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Solution for -3(-7+2r)=9 equation: 



-3(-7+2r)=9

We move all terms to the left:

-3(-7+2r)-(9)=0

We add all the numbers together, and all the variables

-3(2r-7)-9=0

We multiply parentheses

-6r+21-9=0

We add all the numbers together, and all the variables

-6r+12=0

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

-6r=-12

r=-12/-6

r=+2

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