A=(20-2x)*(30-2x)

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Solution for A=(20-2x)*(30-2x) equation: 


Simplifying
A = (20 + -2x)(30 + -2x)

Multiply (20 + -2x) * (30 + -2x)
A = (20(30 + -2x) + -2x * (30 + -2x))
A = ((30 * 20 + -2x * 20) + -2x * (30 + -2x))
A = ((600 + -40x) + -2x * (30 + -2x))
A = (600 + -40x + (30 * -2x + -2x * -2x))
A = (600 + -40x + (-60x + 4x2))

Combine like terms: -40x + -60x = -100x
A = (600 + -100x + 4x2)

Solving
A = 600 + -100x + 4x2

Solving for variable 'A'.

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

Simplifying
A = 600 + -100x + 4x2

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