r-3-6r=7

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Solution for r-3-6r=7 equation: 



r-3-6r=7

We move all terms to the left:

r-3-6r-(7)=0

We add all the numbers together, and all the variables

-5r-10=0

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

-5r=10

r=10/-5

r=-2

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