-7r+1=10+r-9r

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Solution for -7r+1=10+r-9r equation: 



-7r+1=10+r-9r

We move all terms to the left:

-7r+1-(10+r-9r)=0

We add all the numbers together, and all the variables

-7r-(-8r+10)+1=0

We get rid of parentheses

-7r+8r-10+1=0

We add all the numbers together, and all the variables

r-9=0

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

r=9

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