7-7x=4x^2-4x+9x-9

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


Simplifying
7 + -7x = 4x2 + -4x + 9x + -9

Reorder the terms:
7 + -7x = -9 + -4x + 9x + 4x2

Combine like terms: -4x + 9x = 5x
7 + -7x = -9 + 5x + 4x2

Solving
7 + -7x = -9 + 5x + 4x2

Solving for variable 'x'.

Reorder the terms:
7 + 9 + -7x + -5x + -4x2 = -9 + 5x + 4x2 + 9 + -5x + -4x2

Combine like terms: 7 + 9 = 16
16 + -7x + -5x + -4x2 = -9 + 5x + 4x2 + 9 + -5x + -4x2

Combine like terms: -7x + -5x = -12x
16 + -12x + -4x2 = -9 + 5x + 4x2 + 9 + -5x + -4x2

Reorder the terms:
16 + -12x + -4x2 = -9 + 9 + 5x + -5x + 4x2 + -4x2

Combine like terms: -9 + 9 = 0
16 + -12x + -4x2 = 0 + 5x + -5x + 4x2 + -4x2
16 + -12x + -4x2 = 5x + -5x + 4x2 + -4x2

Combine like terms: 5x + -5x = 0
16 + -12x + -4x2 = 0 + 4x2 + -4x2
16 + -12x + -4x2 = 4x2 + -4x2

Combine like terms: 4x2 + -4x2 = 0
16 + -12x + -4x2 = 0

Factor out the Greatest Common Factor (GCF), '4'.
4(4 + -3x + -1x2) = 0

Factor a trinomial.
4((1 + -1x)(4 + x)) = 0

Ignore the factor 4.

Subproblem 1

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

Subproblem 2

Set the factor '(4 + x)' equal to zero and attempt to solve: Simplifying 4 + x = 0 Solving 4 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + x = 0 + -4 Combine like terms: 4 + -4 = 0 0 + x = 0 + -4 x = 0 + -4 Combine like terms: 0 + -4 = -4 x = -4 Simplifying x = -4

Solution

x = {1, -4}

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