-2r+4r-7=9

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Solution for -2r+4r-7=9 equation: 



-2r+4r-7=9

We move all terms to the left:

-2r+4r-7-(9)=0

We add all the numbers together, and all the variables

2r-16=0

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

2r=16

r=16/2

r=8

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