r*1.5=84

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Solution for r*1.5=84 equation: 



r*1.5=84

We move all terms to the left:

r*1.5-(84)=0

Wy multiply elements

1.5r-84=0

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

1.5r=84

r=84/1.5

r=56

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