2+2r=10r-78

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Solution for 2+2r=10r-78 equation: 



2+2r=10r-78

We move all terms to the left:

2+2r-(10r-78)=0

We get rid of parentheses

2r-10r+78+2=0

We add all the numbers together, and all the variables

-8r+80=0

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

-8r=-80

r=-80/-8

r=+10

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