-10(12+r)=-40

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Solution for -10(12+r)=-40 equation: 



-10(12+r)=-40

We move all terms to the left:

-10(12+r)-(-40)=0

We add all the numbers together, and all the variables

-10(r+12)-(-40)=0

We add all the numbers together, and all the variables

-10(r+12)+40=0

We multiply parentheses

-10r-120+40=0

We add all the numbers together, and all the variables

-10r-80=0

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

-10r=80

r=80/-10

r=-8

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