SA=2(lw+hw+hl)

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Solution for SA=2(lw+hw+hl) equation: 


Simplifying
SA = 2(lw + hw + hl)

Reorder the terms:
AS = 2(hl + hw + lw)
AS = (hl * 2 + hw * 2 + lw * 2)
AS = (2hl + 2hw + 2lw)

Solving
AS = 2hl + 2hw + 2lw

Solving for variable 'A'.

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

Divide each side by 'S'.
A = 2hlS-1 + 2hwS-1 + 2lwS-1

Simplifying
A = 2hlS-1 + 2hwS-1 + 2lwS-1

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