-12+5r=18+15r

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Solution for -12+5r=18+15r equation: 



-12+5r=18+15r

We move all terms to the left:

-12+5r-(18+15r)=0

We add all the numbers together, and all the variables

5r-(15r+18)-12=0

We get rid of parentheses

5r-15r-18-12=0

We add all the numbers together, and all the variables

-10r-30=0

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

-10r=30

r=30/-10

r=-3

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