2(r+-1)=-8

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Solution for 2(r+-1)=-8 equation: 



2(r+-1)=-8

We move all terms to the left:

2(r+-1)-(-8)=0

We add all the numbers together, and all the variables

2(r-1)-(-8)=0

We add all the numbers together, and all the variables

2(r-1)+8=0

We multiply parentheses

2r-2+8=0

We add all the numbers together, and all the variables

2r+6=0

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

2r=-6

r=-6/2

r=-3

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