38=18+r

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Solution for 38=18+r equation: 



38=18+r

We move all terms to the left:

38-(18+r)=0

We add all the numbers together, and all the variables

-(r+18)+38=0

We get rid of parentheses

-r-18+38=0

We add all the numbers together, and all the variables

-1r+20=0

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

-r=-20

r=-20/-1

r=+20

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