168=r(-56)

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Solution for 168=r(-56) equation: 



168=r(-56)

We move all terms to the left:

168-(r(-56))=0



We calculate terms in parentheses: -(r(-56)), so:

r(-56)

We multiply parentheses

-56r

Back to the equation:

-(-56r)



We get rid of parentheses

56r+168=0

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

56r=-168

r=-168/56

r=-3

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