7r+3=9+9r

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



7r+3=9+9r

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

7r-9r-9+3=0

We add all the numbers together, and all the variables

-2r-6=0

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

-2r=6

r=6/-2

r=-3

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