9r-7=7r-11

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Solution for 9r-7=7r-11 equation: 



9r-7=7r-11

We move all terms to the left:

9r-7-(7r-11)=0

We get rid of parentheses

9r-7r+11-7=0

We add all the numbers together, and all the variables

2r+4=0

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

2r=-4

r=-4/2

r=-2

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