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

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


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

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

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

Multiply (-2 + x) * (-9 + x)
(-2(-9 + x) + x(-9 + x)) = (x + 9)(x + 7)
((-9 * -2 + x * -2) + x(-9 + x)) = (x + 9)(x + 7)
((18 + -2x) + x(-9 + x)) = (x + 9)(x + 7)
(18 + -2x + (-9 * x + x * x)) = (x + 9)(x + 7)
(18 + -2x + (-9x + x2)) = (x + 9)(x + 7)

Combine like terms: -2x + -9x = -11x
(18 + -11x + x2) = (x + 9)(x + 7)

Reorder the terms:
18 + -11x + x2 = (9 + x)(x + 7)

Reorder the terms:
18 + -11x + x2 = (9 + x)(7 + x)

Multiply (9 + x) * (7 + x)
18 + -11x + x2 = (9(7 + x) + x(7 + x))
18 + -11x + x2 = ((7 * 9 + x * 9) + x(7 + x))
18 + -11x + x2 = ((63 + 9x) + x(7 + x))
18 + -11x + x2 = (63 + 9x + (7 * x + x * x))
18 + -11x + x2 = (63 + 9x + (7x + x2))

Combine like terms: 9x + 7x = 16x
18 + -11x + x2 = (63 + 16x + x2)

Add '-1x2' to each side of the equation.
18 + -11x + x2 + -1x2 = 63 + 16x + x2 + -1x2

Combine like terms: x2 + -1x2 = 0
18 + -11x + 0 = 63 + 16x + x2 + -1x2
18 + -11x = 63 + 16x + x2 + -1x2

Combine like terms: x2 + -1x2 = 0
18 + -11x = 63 + 16x + 0
18 + -11x = 63 + 16x

Solving
18 + -11x = 63 + 16x

Solving for variable 'x'.

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

Add '-16x' to each side of the equation.
18 + -11x + -16x = 63 + 16x + -16x

Combine like terms: -11x + -16x = -27x
18 + -27x = 63 + 16x + -16x

Combine like terms: 16x + -16x = 0
18 + -27x = 63 + 0
18 + -27x = 63

Add '-18' to each side of the equation.
18 + -18 + -27x = 63 + -18

Combine like terms: 18 + -18 = 0
0 + -27x = 63 + -18
-27x = 63 + -18

Combine like terms: 63 + -18 = 45
-27x = 45

Divide each side by '-27'.
x = -1.666666667

Simplifying
x = -1.666666667

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