320.3114=3.14*r^2

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Solution for 320.3114=3.14*r^2 equation: 


Simplifying
320.3114 = 3.14r2

Solving
320.3114 = 3.14r2

Solving for variable 'r'.

Move all terms containing r to the left, all other terms to the right.

Add '-3.14r2' to each side of the equation.
320.3114 + -3.14r2 = 3.14r2 + -3.14r2

Combine like terms: 3.14r2 + -3.14r2 = 0.00
320.3114 + -3.14r2 = 0.00

Add '-320.3114' to each side of the equation.
320.3114 + -320.3114 + -3.14r2 = 0.00 + -320.3114

Combine like terms: 320.3114 + -320.3114 = 0.0000
0.0000 + -3.14r2 = 0.00 + -320.3114
-3.14r2 = 0.00 + -320.3114

Combine like terms: 0.00 + -320.3114 = -320.3114
-3.14r2 = -320.3114

Divide each side by '-3.14'.
r2 = 102.01

Simplifying
r2 = 102.01

Take the square root of each side:
r = {-10.1, 10.1}

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