30=-4r+2r

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Solution for 30=-4r+2r equation: 



30=-4r+2r

We move all terms to the left:

30-(-4r+2r)=0

We add all the numbers together, and all the variables

-(-2r)+30=0

We get rid of parentheses

2r+30=0

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

2r=-30

r=-30/2

r=-15

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