70=2r-10

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Solution for 70=2r-10 equation: 



70=2r-10

We move all terms to the left:

70-(2r-10)=0

We get rid of parentheses

-2r+10+70=0

We add all the numbers together, and all the variables

-2r+80=0

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

-2r=-80

r=-80/-2

r=+40

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