-3(7-2r)=-28-r

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Solution for -3(7-2r)=-28-r equation: 



-3(7-2r)=-28-r

We move all terms to the left:

-3(7-2r)-(-28-r)=0

We add all the numbers together, and all the variables

-3(-2r+7)-(-1r-28)=0

We multiply parentheses

6r-(-1r-28)-21=0

We get rid of parentheses

6r+1r+28-21=0

We add all the numbers together, and all the variables

7r+7=0

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

7r=-7

r=-7/7

r=-1

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