21+6r=93

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Solution for 21+6r=93 equation: 



21+6r=93

We move all terms to the left:

21+6r-(93)=0

We add all the numbers together, and all the variables

6r-72=0

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

6r=72

r=72/6

r=12

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