6.2=-0.4r

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Solution for 6.2=-0.4r equation: 



6.2=-0.4r

We move all terms to the left:

6.2-(-0.4r)=0

We get rid of parentheses

0.4r+6.2=0

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

0.4r=-6.2

r=-6.2/0.4

r=-15+0.2/0.4

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