6r-3=-21

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Solution for 6r-3=-21 equation: 



6r-3=-21

We move all terms to the left:

6r-3-(-21)=0

We add all the numbers together, and all the variables

6r+18=0

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

6r=-18

r=-18/6

r=-3

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