5r+2r+6=90

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Solution for 5r+2r+6=90 equation: 



5r+2r+6=90

We move all terms to the left:

5r+2r+6-(90)=0

We add all the numbers together, and all the variables

7r-84=0

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

7r=84

r=84/7

r=12

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