4r-12=-4

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Solution for 4r-12=-4 equation: 



4r-12=-4

We move all terms to the left:

4r-12-(-4)=0

We add all the numbers together, and all the variables

4r-8=0

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

4r=8

r=8/4

r=2

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