k=(13-2x)(10-2x)x

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Solution for k=(13-2x)(10-2x)x equation: 


Simplifying
k = (13 + -2x)(10 + -2x) * x

Reorder the terms for easier multiplication:
k = x(13 + -2x)(10 + -2x)

Multiply (13 + -2x) * (10 + -2x)
k = x(13(10 + -2x) + -2x * (10 + -2x))
k = x((10 * 13 + -2x * 13) + -2x * (10 + -2x))
k = x((130 + -26x) + -2x * (10 + -2x))
k = x(130 + -26x + (10 * -2x + -2x * -2x))
k = x(130 + -26x + (-20x + 4x2))

Combine like terms: -26x + -20x = -46x
k = x(130 + -46x + 4x2)
k = (130 * x + -46x * x + 4x2 * x)
k = (130x + -46x2 + 4x3)

Solving
k = 130x + -46x2 + 4x3

Solving for variable 'k'.

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

Simplifying
k = 130x + -46x2 + 4x3

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