3r+7+9r=135

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Solution for 3r+7+9r=135 equation: 



3r+7+9r=135

We move all terms to the left:

3r+7+9r-(135)=0

We add all the numbers together, and all the variables

12r-128=0

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

12r=128

r=128/12

r=10+2/3

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