2r-3+r-8+2r+9+r-4=72

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Solution for 2r-3+r-8+2r+9+r-4=72 equation: 



2r-3+r-8+2r+9+r-4=72

We move all terms to the left:

2r-3+r-8+2r+9+r-4-(72)=0

We add all the numbers together, and all the variables

6r-78=0

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

6r=78

r=78/6

r=13

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