-18.8=-4r

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Solution for -18.8=-4r equation: 



-18.8=-4r

We move all terms to the left:

-18.8-(-4r)=0

We get rid of parentheses

4r-18.8=0

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

4r=18.8

r=18.8/4

r=4+1/1.4285714285714

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