(x-5)(x-4)-2=x(x-7)

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Solution for (x-5)(x-4)-2=x(x-7) equation:


Simplifying
(x + -5)(x + -4) + -2 = x(x + -7)

Reorder the terms:
(-5 + x)(x + -4) + -2 = x(x + -7)

Reorder the terms:
(-5 + x)(-4 + x) + -2 = x(x + -7)

Multiply (-5 + x) * (-4 + x)
(-5(-4 + x) + x(-4 + x)) + -2 = x(x + -7)
((-4 * -5 + x * -5) + x(-4 + x)) + -2 = x(x + -7)
((20 + -5x) + x(-4 + x)) + -2 = x(x + -7)
(20 + -5x + (-4 * x + x * x)) + -2 = x(x + -7)
(20 + -5x + (-4x + x2)) + -2 = x(x + -7)

Combine like terms: -5x + -4x = -9x
(20 + -9x + x2) + -2 = x(x + -7)

Reorder the terms:
20 + -2 + -9x + x2 = x(x + -7)

Combine like terms: 20 + -2 = 18
18 + -9x + x2 = x(x + -7)

Reorder the terms:
18 + -9x + x2 = x(-7 + x)
18 + -9x + x2 = (-7 * x + x * x)
18 + -9x + x2 = (-7x + x2)

Add '-1x2' to each side of the equation.
18 + -9x + x2 + -1x2 = -7x + x2 + -1x2

Combine like terms: x2 + -1x2 = 0
18 + -9x + 0 = -7x + x2 + -1x2
18 + -9x = -7x + x2 + -1x2

Combine like terms: x2 + -1x2 = 0
18 + -9x = -7x + 0
18 + -9x = -7x

Solving
18 + -9x = -7x

Solving for variable 'x'.

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

Add '7x' to each side of the equation.
18 + -9x + 7x = -7x + 7x

Combine like terms: -9x + 7x = -2x
18 + -2x = -7x + 7x

Combine like terms: -7x + 7x = 0
18 + -2x = 0

Add '-18' to each side of the equation.
18 + -18 + -2x = 0 + -18

Combine like terms: 18 + -18 = 0
0 + -2x = 0 + -18
-2x = 0 + -18

Combine like terms: 0 + -18 = -18
-2x = -18

Divide each side by '-2'.
x = 9

Simplifying
x = 9

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