-2r+3=-r+12

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Solution for -2r+3=-r+12 equation: 



-2r+3=-r+12

We move all terms to the left:

-2r+3-(-r+12)=0

We add all the numbers together, and all the variables

-2r-(-1r+12)+3=0

We get rid of parentheses

-2r+1r-12+3=0

We add all the numbers together, and all the variables

-1r-9=0

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

-r=9

r=9/-1

r=-9

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