10r-7-3r+r=9

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Solution for 10r-7-3r+r=9 equation: 



10r-7-3r+r=9

We move all terms to the left:

10r-7-3r+r-(9)=0

We add all the numbers together, and all the variables

8r-16=0

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

8r=16

r=16/8

r=2

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