-2=r(-5)

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Solution for -2=r(-5) equation: 



-2=r(-5)

We move all terms to the left:

-2-(r(-5))=0



We calculate terms in parentheses: -(r(-5)), so:

r(-5)

We multiply parentheses

-5r

Back to the equation:

-(-5r)



We get rid of parentheses

5r-2=0

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

5r=2

r=2/5

r=2/5

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