80=4(3.14)rr

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Solution for 80=4(3.14)rr equation:


80=4(3.14)rr

We simplify the equation to the form, which is simple to understand 
80=4(3.14)r

Reorder the terms in parentheses
80=+(+12.56)*r

Reorder the terms in parentheses
80=+(+12.56r)

Remove unnecessary parentheses
+80=+12.56r

We move all terms containing r to the left and all other terms to the right. 
-12.56r=-80

We simplify left and right side of the equation. 
-12.56r=-80

We divide both sides of the equation by -012.56 to get r. 
r=6.36942675159

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