-5r-2r=7

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Solution for -5r-2r=7 equation: 



-5r-2r=7

We move all terms to the left:

-5r-2r-(7)=0

We add all the numbers together, and all the variables

-7r-7=0

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

-7r=7

r=7/-7

r=-1

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