-7(r-2)=-2r-21

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Solution for -7(r-2)=-2r-21 equation: 



-7(r-2)=-2r-21

We move all terms to the left:

-7(r-2)-(-2r-21)=0

We multiply parentheses

-7r-(-2r-21)+14=0

We get rid of parentheses

-7r+2r+21+14=0

We add all the numbers together, and all the variables

-5r+35=0

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

-5r=-35

r=-35/-5

r=+7

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