A=3.14(R^2-r^2)

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Solution for A=3.14(R^2-r^2) equation:


Simplifying
A = 3.14(R2 + -1r2)
A = (R2 * 3.14 + -1r2 * 3.14)
A = (3.14R2 + -3.14r2)

Solving
A = 3.14R2 + -3.14r2

Solving for variable 'A'.

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

Simplifying
A = 3.14R2 + -3.14r2

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