7r-2=-10r-20+18r

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Solution for 7r-2=-10r-20+18r equation: 



7r-2=-10r-20+18r

We move all terms to the left:

7r-2-(-10r-20+18r)=0

We add all the numbers together, and all the variables

7r-(8r-20)-2=0

We get rid of parentheses

7r-8r+20-2=0

We add all the numbers together, and all the variables

-1r+18=0

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

-r=-18

r=-18/-1

r=+18

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