-9+8r=7+4r

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Solution for -9+8r=7+4r equation: 



-9+8r=7+4r

We move all terms to the left:

-9+8r-(7+4r)=0

We add all the numbers together, and all the variables

8r-(4r+7)-9=0

We get rid of parentheses

8r-4r-7-9=0

We add all the numbers together, and all the variables

4r-16=0

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

4r=16

r=16/4

r=4

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