9r+9=7r-3

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



9r+9=7r-3

We move all terms to the left:

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

We get rid of parentheses

9r-7r+3+9=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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