A(7)=4pir^2

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Solution for A(7)=4pir^2 equation: 


Simplifying
A(7) = 4pir2

Reorder the terms for easier multiplication:
7A = 4pir2

Solving
7A = 4ipr2

Solving for variable 'A'.

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

Divide each side by '7'.
A = 0.5714285714ipr2

Simplifying
A = 0.5714285714ipr2

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