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

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


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

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

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

Multiply (7 + x) * (-2 + x)
(7(-2 + x) + x(-2 + x)) = x(x + -9)
((-2 * 7 + x * 7) + x(-2 + x)) = x(x + -9)
((-14 + 7x) + x(-2 + x)) = x(x + -9)
(-14 + 7x + (-2 * x + x * x)) = x(x + -9)
(-14 + 7x + (-2x + x2)) = x(x + -9)

Combine like terms: 7x + -2x = 5x
(-14 + 5x + x2) = x(x + -9)

Reorder the terms:
-14 + 5x + x2 = x(-9 + x)
-14 + 5x + x2 = (-9 * x + x * x)
-14 + 5x + x2 = (-9x + x2)

Add '-1x2' to each side of the equation.
-14 + 5x + x2 + -1x2 = -9x + x2 + -1x2

Combine like terms: x2 + -1x2 = 0
-14 + 5x + 0 = -9x + x2 + -1x2
-14 + 5x = -9x + x2 + -1x2

Combine like terms: x2 + -1x2 = 0
-14 + 5x = -9x + 0
-14 + 5x = -9x

Solving
-14 + 5x = -9x

Solving for variable 'x'.

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

Add '9x' to each side of the equation.
-14 + 5x + 9x = -9x + 9x

Combine like terms: 5x + 9x = 14x
-14 + 14x = -9x + 9x

Combine like terms: -9x + 9x = 0
-14 + 14x = 0

Add '14' to each side of the equation.
-14 + 14 + 14x = 0 + 14

Combine like terms: -14 + 14 = 0
0 + 14x = 0 + 14
14x = 0 + 14

Combine like terms: 0 + 14 = 14
14x = 14

Divide each side by '14'.
x = 1

Simplifying
x = 1

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