15=(3x-4)x

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Solution for 15=(3x-4)x equation:


Simplifying
15 = (3x + -4) * x

Reorder the terms:
15 = (-4 + 3x) * x

Reorder the terms for easier multiplication:
15 = x(-4 + 3x)
15 = (-4 * x + 3x * x)
15 = (-4x + 3x2)

Solving
15 = -4x + 3x2

Solving for variable 'x'.

Reorder the terms:
15 + 4x + -3x2 = -4x + 4x + 3x2 + -3x2

Combine like terms: -4x + 4x = 0
15 + 4x + -3x2 = 0 + 3x2 + -3x2
15 + 4x + -3x2 = 3x2 + -3x2

Combine like terms: 3x2 + -3x2 = 0
15 + 4x + -3x2 = 0

Factor a trinomial.
(3 + -1x)(5 + 3x) = 0

Subproblem 1

Set the factor '(3 + -1x)' equal to zero and attempt to solve: Simplifying 3 + -1x = 0 Solving 3 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + -1x = 0 + -3 Combine like terms: 3 + -3 = 0 0 + -1x = 0 + -3 -1x = 0 + -3 Combine like terms: 0 + -3 = -3 -1x = -3 Divide each side by '-1'. x = 3 Simplifying x = 3

Subproblem 2

Set the factor '(5 + 3x)' equal to zero and attempt to solve: Simplifying 5 + 3x = 0 Solving 5 + 3x = 0 Move all terms containing x to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + 3x = 0 + -5 Combine like terms: 5 + -5 = 0 0 + 3x = 0 + -5 3x = 0 + -5 Combine like terms: 0 + -5 = -5 3x = -5 Divide each side by '3'. x = -1.666666667 Simplifying x = -1.666666667

Solution

x = {3, -1.666666667}

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