x(x)+5x=9x+12

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Solution for x(x)+5x=9x+12 equation: 


Simplifying
x(x) + 5x = 9x + 12

Multiply x * x
x2 + 5x = 9x + 12

Reorder the terms:
5x + x2 = 9x + 12

Reorder the terms:
5x + x2 = 12 + 9x

Solving
5x + x2 = 12 + 9x

Solving for variable 'x'.

Reorder the terms:
-12 + 5x + -9x + x2 = 12 + 9x + -12 + -9x

Combine like terms: 5x + -9x = -4x
-12 + -4x + x2 = 12 + 9x + -12 + -9x

Reorder the terms:
-12 + -4x + x2 = 12 + -12 + 9x + -9x

Combine like terms: 12 + -12 = 0
-12 + -4x + x2 = 0 + 9x + -9x
-12 + -4x + x2 = 9x + -9x

Combine like terms: 9x + -9x = 0
-12 + -4x + x2 = 0

Factor a trinomial.
(-2 + -1x)(6 + -1x) = 0


Subproblem 1
Set the factor '(-2 + -1x)' equal to zero and attempt to solve:

Simplifying
-2 + -1x = 0

Solving
-2 + -1x = 0

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

Add '2' to each side of the equation.
-2 + 2 + -1x = 0 + 2

Combine like terms: -2 + 2 = 0
0 + -1x = 0 + 2
-1x = 0 + 2

Combine like terms: 0 + 2 = 2
-1x = 2

Divide each side by '-1'.
x = -2

Simplifying
x = -2

Subproblem 2
Set the factor '(6 + -1x)' equal to zero and attempt to solve:

Simplifying
6 + -1x = 0

Solving
6 + -1x = 0

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

Add '-6' to each side of the equation.
6 + -6 + -1x = 0 + -6

Combine like terms: 6 + -6 = 0
0 + -1x = 0 + -6
-1x = 0 + -6

Combine like terms: 0 + -6 = -6
-1x = -6

Divide each side by '-1'.
x = 6

Simplifying
x = 6
Solution
x = {-2, 6}

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