90=(9+x)x(5+x)

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Solution for 90=(9+x)x(5+x) equation: 


Simplifying
90 = (9 + x) * x(5 + x)

Reorder the terms for easier multiplication:
90 = x(9 + x)(5 + x)

Multiply (9 + x) * (5 + x)
90 = x(9(5 + x) + x(5 + x))
90 = x((5 * 9 + x * 9) + x(5 + x))
90 = x((45 + 9x) + x(5 + x))
90 = x(45 + 9x + (5 * x + x * x))
90 = x(45 + 9x + (5x + x2))

Combine like terms: 9x + 5x = 14x
90 = x(45 + 14x + x2)
90 = (45 * x + 14x * x + x2 * x)
90 = (45x + 14x2 + x3)

Solving
90 = 45x + 14x2 + x3

Solving for variable 'x'.

Reorder the terms:
90 + -45x + -14x2 + -1x3 = 45x + -45x + 14x2 + -14x2 + x3 + -1x3

Combine like terms: 45x + -45x = 0
90 + -45x + -14x2 + -1x3 = 0 + 14x2 + -14x2 + x3 + -1x3
90 + -45x + -14x2 + -1x3 = 14x2 + -14x2 + x3 + -1x3

Combine like terms: 14x2 + -14x2 = 0
90 + -45x + -14x2 + -1x3 = 0 + x3 + -1x3
90 + -45x + -14x2 + -1x3 = x3 + -1x3

Combine like terms: x3 + -1x3 = 0
90 + -45x + -14x2 + -1x3 = 0

The solution to this equation could not be determined.

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