3r-7+9r=30

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Solution for 3r-7+9r=30 equation: 



3r-7+9r=30

We move all terms to the left:

3r-7+9r-(30)=0

We add all the numbers together, and all the variables

12r-37=0

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

12r=37

r=37/12

r=3+1/12

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