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

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


Simplifying
x(x + -4) = x2 + 7 + 5

Reorder the terms:
x(-4 + x) = x2 + 7 + 5
(-4 * x + x * x) = x2 + 7 + 5
(-4x + x2) = x2 + 7 + 5

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

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

Add '-1x2' to each side of the equation.
-4x + x2 + -1x2 = 12 + x2 + -1x2

Combine like terms: x2 + -1x2 = 0
-4x + 0 = 12 + x2 + -1x2
-4x = 12 + x2 + -1x2

Combine like terms: x2 + -1x2 = 0
-4x = 12 + 0
-4x = 12

Solving
-4x = 12

Solving for variable 'x'.

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

Divide each side by '-4'.
x = -3

Simplifying
x = -3

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