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

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


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

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

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

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

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

Solving
-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.
-9x + -7x = 7x + -7x

Combine like terms: -9x + -7x = -16x
-16x = 7x + -7x

Combine like terms: 7x + -7x = 0
-16x = 0

Divide each side by '-16'.
x = 0

Simplifying
x = 0

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