7r+1=8r-2

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Solution for 7r+1=8r-2 equation: 



7r+1=8r-2

We move all terms to the left:

7r+1-(8r-2)=0

We get rid of parentheses

7r-8r+2+1=0

We add all the numbers together, and all the variables

-1r+3=0

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

-r=-3

r=-3/-1

r=+3

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