3r+2-7r=-10

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Solution for 3r+2-7r=-10 equation: 



3r+2-7r=-10

We move all terms to the left:

3r+2-7r-(-10)=0

We add all the numbers together, and all the variables

-4r+12=0

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

-4r=-12

r=-12/-4

r=+3

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