3r-5=r+7

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Solution for 3r-5=r+7 equation: 



3r-5=r+7

We move all terms to the left:

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

We get rid of parentheses

3r-r-7-5=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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