10-2r=-10

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Solution for 10-2r=-10 equation: 



10-2r=-10

We move all terms to the left:

10-2r-(-10)=0

We add all the numbers together, and all the variables

-2r+20=0

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

-2r=-20

r=-20/-2

r=+10

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