8-r=-2

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Solution for 8-r=-2 equation: 



8-r=-2

We move all terms to the left:

8-r-(-2)=0

We add all the numbers together, and all the variables

-1r+10=0

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

-r=-10

r=-10/-1

r=+10

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