7r=-9r-128

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Solution for 7r=-9r-128 equation: 



7r=-9r-128

We move all terms to the left:

7r-(-9r-128)=0

We get rid of parentheses

7r+9r+128=0

We add all the numbers together, and all the variables

16r+128=0

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

16r=-128

r=-128/16

r=-8

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