-2r+9=-4r+27

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Solution for -2r+9=-4r+27 equation: 



-2r+9=-4r+27

We move all terms to the left:

-2r+9-(-4r+27)=0

We get rid of parentheses

-2r+4r-27+9=0

We add all the numbers together, and all the variables

2r-18=0

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

2r=18

r=18/2

r=9

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