-r+18=42

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Solution for -r+18=42 equation: 



-r+18=42

We move all terms to the left:

-r+18-(42)=0

We add all the numbers together, and all the variables

-1r-24=0

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

-r=24

r=24/-1

r=-24

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