18-15r=-12-18r

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



18-15r=-12-18r

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

-15r+18r+12+18=0

We add all the numbers together, and all the variables

3r+30=0

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

3r=-30

r=-30/3

r=-10

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