(2+7x)(9x-4)=(2+7x)

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Solution for (2+7x)(9x-4)=(2+7x) equation:


Simplifying
(2 + 7x)(9x + -4) = (2 + 7x)

Reorder the terms:
(2 + 7x)(-4 + 9x) = (2 + 7x)

Multiply (2 + 7x) * (-4 + 9x)
(2(-4 + 9x) + 7x * (-4 + 9x)) = (2 + 7x)
((-4 * 2 + 9x * 2) + 7x * (-4 + 9x)) = (2 + 7x)
((-8 + 18x) + 7x * (-4 + 9x)) = (2 + 7x)
(-8 + 18x + (-4 * 7x + 9x * 7x)) = (2 + 7x)
(-8 + 18x + (-28x + 63x2)) = (2 + 7x)

Combine like terms: 18x + -28x = -10x
(-8 + -10x + 63x2) = (2 + 7x)

Remove parenthesis around (2 + 7x)
-8 + -10x + 63x2 = 2 + 7x

Solving
-8 + -10x + 63x2 = 2 + 7x

Solving for variable 'x'.

Reorder the terms:
-8 + -2 + -10x + -7x + 63x2 = 2 + 7x + -2 + -7x

Combine like terms: -8 + -2 = -10
-10 + -10x + -7x + 63x2 = 2 + 7x + -2 + -7x

Combine like terms: -10x + -7x = -17x
-10 + -17x + 63x2 = 2 + 7x + -2 + -7x

Reorder the terms:
-10 + -17x + 63x2 = 2 + -2 + 7x + -7x

Combine like terms: 2 + -2 = 0
-10 + -17x + 63x2 = 0 + 7x + -7x
-10 + -17x + 63x2 = 7x + -7x

Combine like terms: 7x + -7x = 0
-10 + -17x + 63x2 = 0

Factor a trinomial.
(-2 + -7x)(5 + -9x) = 0

Subproblem 1

Set the factor '(-2 + -7x)' equal to zero and attempt to solve: Simplifying -2 + -7x = 0 Solving -2 + -7x = 0 Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + -7x = 0 + 2 Combine like terms: -2 + 2 = 0 0 + -7x = 0 + 2 -7x = 0 + 2 Combine like terms: 0 + 2 = 2 -7x = 2 Divide each side by '-7'. x = -0.2857142857 Simplifying x = -0.2857142857

Subproblem 2

Set the factor '(5 + -9x)' equal to zero and attempt to solve: Simplifying 5 + -9x = 0 Solving 5 + -9x = 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 + -9x = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -9x = 0 + -5 -9x = 0 + -5 Combine like terms: 0 + -5 = -5 -9x = -5 Divide each side by '-9'. x = 0.5555555556 Simplifying x = 0.5555555556

Solution

x = {-0.2857142857, 0.5555555556}

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