SA=2*3.14r*r+2*3.14*r*h

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Solution for SA=2*3.14r*r+2*3.14*r*h equation: 


Simplifying
SA = 2 * 3.14r * r + 2 * 3.14r * h

Multiply 2 * 3.14
AS = 6.28r * r + 2 * 3.14r * h

Multiply r * r
AS = 6.28r2 + 2 * 3.14r * h

Multiply 2 * 3.14
AS = 6.28r2 + 6.28r * h

Multiply r * h
AS = 6.28r2 + 6.28hr

Reorder the terms:
AS = 6.28hr + 6.28r2

Solving
AS = 6.28hr + 6.28r2

Solving for variable 'A'.

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

Divide each side by 'S'.
A = 6.28hrS-1 + 6.28r2S-1

Simplifying
A = 6.28hrS-1 + 6.28r2S-1

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