3=-12+5r

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Solution for 3=-12+5r equation: 



3=-12+5r

We move all terms to the left:

3-(-12+5r)=0

We add all the numbers together, and all the variables

-(5r-12)+3=0

We get rid of parentheses

-5r+12+3=0

We add all the numbers together, and all the variables

-5r+15=0

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

-5r=-15

r=-15/-5

r=+3

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