-4r+9=-8r-7

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Solution for -4r+9=-8r-7 equation: 



-4r+9=-8r-7

We move all terms to the left:

-4r+9-(-8r-7)=0

We get rid of parentheses

-4r+8r+7+9=0

We add all the numbers together, and all the variables

4r+16=0

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

4r=-16

r=-16/4

r=-4

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