-9r+8=r+18

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Solution for -9r+8=r+18 equation: 



-9r+8=r+18

We move all terms to the left:

-9r+8-(r+18)=0

We get rid of parentheses

-9r-r-18+8=0

We add all the numbers together, and all the variables

-10r-10=0

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

-10r=10

r=10/-10

r=-1

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