-4=r-3r

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Solution for -4=r-3r equation: 



-4=r-3r

We move all terms to the left:

-4-(r-3r)=0

We add all the numbers together, and all the variables

-(-2r)-4=0

We get rid of parentheses

2r-4=0

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

2r=4

r=4/2

r=2

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