-2=-0.42r

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Solution for -2=-0.42r equation: 



-2=-0.42r

We move all terms to the left:

-2-(-0.42r)=0

We get rid of parentheses

0.42r-2=0

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

0.42r=2

r=2/0.42

r=4+0.32/0.42

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