r-3+4r=9+7r

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Solution for r-3+4r=9+7r equation: 



r-3+4r=9+7r

We move all terms to the left:

r-3+4r-(9+7r)=0

We add all the numbers together, and all the variables

r+4r-(7r+9)-3=0

We add all the numbers together, and all the variables

5r-(7r+9)-3=0

We get rid of parentheses

5r-7r-9-3=0

We add all the numbers together, and all the variables

-2r-12=0

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

-2r=12

r=12/-2

r=-6

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