v(x)=(20-2x)(8-2x)

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Solution for v(x)=(20-2x)(8-2x) equation: 


Simplifying
v(x) = (20 + -2x)(8 + -2x)

Multiply v * x
vx = (20 + -2x)(8 + -2x)

Multiply (20 + -2x) * (8 + -2x)
vx = (20(8 + -2x) + -2x * (8 + -2x))
vx = ((8 * 20 + -2x * 20) + -2x * (8 + -2x))
vx = ((160 + -40x) + -2x * (8 + -2x))
vx = (160 + -40x + (8 * -2x + -2x * -2x))
vx = (160 + -40x + (-16x + 4x2))

Combine like terms: -40x + -16x = -56x
vx = (160 + -56x + 4x2)

Solving
vx = 160 + -56x + 4x2

Solving for variable 'v'.

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

Divide each side by 'x'.
v = 160x-1 + -56 + 4x

Simplifying
v = 160x-1 + -56 + 4x

Reorder the terms:
v = -56 + 160x-1 + 4x

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