-13+10r=7

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Solution for -13+10r=7 equation: 



-13+10r=7

We move all terms to the left:

-13+10r-(7)=0

We add all the numbers together, and all the variables

10r-20=0

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

10r=20

r=20/10

r=2

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