7r-6.5r=-20.5

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Solution for 7r-6.5r=-20.5 equation: 



7r-6.5r=-20.5

We move all terms to the left:

7r-6.5r-(-20.5)=0

We add all the numbers together, and all the variables

0.5r+20.5=0

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

0.5r=-20.5

r=-20.5/0.5

r=-41

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