-7+8r=4r+5r

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Solution for -7+8r=4r+5r equation: 



-7+8r=4r+5r

We move all terms to the left:

-7+8r-(4r+5r)=0

We add all the numbers together, and all the variables

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

We get rid of parentheses

8r-9r-7=0

We add all the numbers together, and all the variables

-1r-7=0

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

-r=7

r=7/-1

r=-7

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