8+1-2r+7r=r-3

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Solution for 8+1-2r+7r=r-3 equation: 



8+1-2r+7r=r-3

We move all terms to the left:

8+1-2r+7r-(r-3)=0

We add all the numbers together, and all the variables

5r-(r-3)+9=0

We get rid of parentheses

5r-r+3+9=0

We add all the numbers together, and all the variables

4r+12=0

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

4r=-12

r=-12/4

r=-3

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