X-1(2x)(x-4)=40

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Solution for X-1(2x)(x-4)=40 equation: 


Simplifying
X + -1(2x)(x + -4) = 40

Remove parenthesis around (2x)
X + -1 * 2x(x + -4) = 40

Reorder the terms:
X + -1 * 2x(-4 + x) = 40

Multiply -1 * 2
X + -2x(-4 + x) = 40
X + (-4 * -2x + x * -2x) = 40
X + (8x + -2x2) = 40

Solving
X + 8x + -2x2 = 40

Solving for variable 'X'.

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

Add '-8x' to each side of the equation.
X + 8x + -8x + -2x2 = 40 + -8x

Combine like terms: 8x + -8x = 0
X + 0 + -2x2 = 40 + -8x
X + -2x2 = 40 + -8x

Add '2x2' to each side of the equation.
X + -2x2 + 2x2 = 40 + -8x + 2x2

Combine like terms: -2x2 + 2x2 = 0
X + 0 = 40 + -8x + 2x2
X = 40 + -8x + 2x2

Simplifying
X = 40 + -8x + 2x2

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