2(r+10)=-20

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Solution for 2(r+10)=-20 equation: 



2(r+10)=-20

We move all terms to the left:

2(r+10)-(-20)=0

We add all the numbers together, and all the variables

2(r+10)+20=0

We multiply parentheses

2r+20+20=0

We add all the numbers together, and all the variables

2r+40=0

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

2r=-40

r=-40/2

r=-20

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