82.5+2r=338.5

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Solution for 82.5+2r=338.5 equation: 



82.5+2r=338.5

We move all terms to the left:

82.5+2r-(338.5)=0

We add all the numbers together, and all the variables

2r-256=0

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

2r=256

r=256/2

r=128

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