-3r-3=42r

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Solution for -3r-3=42r equation: 



-3r-3=42r

We move all terms to the left:

-3r-3-(42r)=0

We add all the numbers together, and all the variables

-45r-3=0

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

-45r=3

r=3/-45

r=-1/15

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