-10(r-4)=-30

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Solution for -10(r-4)=-30 equation: 



-10(r-4)=-30

We move all terms to the left:

-10(r-4)-(-30)=0

We add all the numbers together, and all the variables

-10(r-4)+30=0

We multiply parentheses

-10r+40+30=0

We add all the numbers together, and all the variables

-10r+70=0

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

-10r=-70

r=-70/-10

r=+7

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