315=(800)r(0.5)

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Solution for 315=(800)r(0.5) equation: 



315=(800)r(0.5)

We move all terms to the left:

315-((800)r(0.5))=0



We calculate terms in parentheses: -(800r(0.5)), so:

800r(0.5)

We multiply parentheses

400r

Back to the equation:

-(400r)



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

-400r=-315

r=-315/-400

r=63/80

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