-7r+9=r+257

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Solution for -7r+9=r+257 equation: 



-7r+9=r+257

We move all terms to the left:

-7r+9-(r+257)=0

We get rid of parentheses

-7r-r-257+9=0

We add all the numbers together, and all the variables

-8r-248=0

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

-8r=248

r=248/-8

r=-31

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