-21+48=3r

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Solution for -21+48=3r equation: 



-21+48=3r

We move all terms to the left:

-21+48-(3r)=0

We add all the numbers together, and all the variables

-3r+27=0

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

-3r=-27

r=-27/-3

r=+9

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