18r-8=20r

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Solution for 18r-8=20r equation: 



18r-8=20r

We move all terms to the left:

18r-8-(20r)=0

We add all the numbers together, and all the variables

-2r-8=0

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

-2r=8

r=8/-2

r=-4

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