9=-7.5r-6

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Solution for 9=-7.5r-6 equation: 



9=-7.5r-6

We move all terms to the left:

9-(-7.5r-6)=0

We get rid of parentheses

7.5r+6+9=0

We add all the numbers together, and all the variables

7.5r+15=0

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

7.5r=-15

r=-15/7.5

r=-2

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