18-5r=-20r-12

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Solution for 18-5r=-20r-12 equation: 



18-5r=-20r-12

We move all terms to the left:

18-5r-(-20r-12)=0

We get rid of parentheses

-5r+20r+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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