-6r-21=75

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Solution for -6r-21=75 equation: 



-6r-21=75

We move all terms to the left:

-6r-21-(75)=0

We add all the numbers together, and all the variables

-6r-96=0

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

-6r=96

r=96/-6

r=-16

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