2+r/3=9

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Solution for 2+r/3=9 equation: 



2+r/3=9

We move all terms to the left:

2+r/3-(9)=0

We add all the numbers together, and all the variables

r/3-7=0

We multiply all the terms by the denominator


r-7*3=0

We add all the numbers together, and all the variables

r-21=0

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

r=21

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