452=3.14*r^2*4

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Solution for 452=3.14*r^2*4 equation: 



452=3.14*r^2*4

We move all terms to the left:

452-(3.14*r^2*4)=0

We get rid of parentheses

-3.14*r^2*4+452=0

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

-3.14*r^2*4=-452

r=-452/1

r=-452

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