-18=8r-10r

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Solution for -18=8r-10r equation: 



-18=8r-10r

We move all terms to the left:

-18-(8r-10r)=0

We add all the numbers together, and all the variables

-(-2r)-18=0

We get rid of parentheses

2r-18=0

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

2r=18

r=18/2

r=9

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