a=(20+2x)(15+2x)

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Solution for a=(20+2x)(15+2x) equation: 


Simplifying
a = (20 + 2x)(15 + 2x)

Multiply (20 + 2x) * (15 + 2x)
a = (20(15 + 2x) + 2x * (15 + 2x))
a = ((15 * 20 + 2x * 20) + 2x * (15 + 2x))
a = ((300 + 40x) + 2x * (15 + 2x))
a = (300 + 40x + (15 * 2x + 2x * 2x))
a = (300 + 40x + (30x + 4x2))

Combine like terms: 40x + 30x = 70x
a = (300 + 70x + 4x2)

Solving
a = 300 + 70x + 4x2

Solving for variable 'a'.

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

Simplifying
a = 300 + 70x + 4x2

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