9r=8+7r

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Solution for 9r=8+7r equation: 



9r=8+7r

We move all terms to the left:

9r-(8+7r)=0

We add all the numbers together, and all the variables

9r-(7r+8)=0

We get rid of parentheses

9r-7r-8=0

We add all the numbers together, and all the variables

2r-8=0

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

2r=8

r=8/2

r=4

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