3r+18=-12r+-12

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Solution for 3r+18=-12r+-12 equation: 



3r+18=-12r+-12

We move all terms to the left:

3r+18-(-12r+-12)=0

We add all the numbers together, and all the variables

3r-(-12r-12)+18=0

We get rid of parentheses

3r+12r+12+18=0

We add all the numbers together, and all the variables

15r+30=0

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

15r=-30

r=-30/15

r=-2

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