20r+18=172-2r

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Solution for 20r+18=172-2r equation: 



20r+18=172-2r

We move all terms to the left:

20r+18-(172-2r)=0

We add all the numbers together, and all the variables

20r-(-2r+172)+18=0

We get rid of parentheses

20r+2r-172+18=0

We add all the numbers together, and all the variables

22r-154=0

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

22r=154

r=154/22

r=7

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