5r+3r=72

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Solution for 5r+3r=72 equation: 



5r+3r=72

We move all terms to the left:

5r+3r-(72)=0

We add all the numbers together, and all the variables

8r-72=0

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

8r=72

r=72/8

r=9

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