18x-18=x^2+9x

Solution for 18x-18=x^2+9x equation:

Simplifying
18x + -18 = x2 + 9x

Reorder the terms:
-18 + 18x = x2 + 9x

Reorder the terms:
-18 + 18x = 9x + x2

Solving
-18 + 18x = 9x + x2

Solving for variable 'x'.

Combine like terms: 18x + -9x = 9x
-18 + 9x + -1x2 = 9x + x2 + -9x + -1x2

Reorder the terms:
-18 + 9x + -1x2 = 9x + -9x + x2 + -1x2

Combine like terms: 9x + -9x = 0
-18 + 9x + -1x2 = 0 + x2 + -1x2
-18 + 9x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
-18 + 9x + -1x2 = 0

Factor a trinomial.
(-6 + x)(3 + -1x) = 0

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

Simplifying
-6 + x = 0

Solving
-6 + x = 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 + x = 0 + 6

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

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

Simplifying
x = 6
Subproblem 2
Set the factor '(3 + -1x)' equal to zero and attempt to solve:

Simplifying
3 + -1x = 0

Solving
3 + -1x = 0

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

Add '-3' to each side of the equation.
3 + -3 + -1x = 0 + -3

Combine like terms: 3 + -3 = 0
0 + -1x = 0 + -3
-1x = 0 + -3

Combine like terms: 0 + -3 = -3
-1x = -3

Divide each side by '-1'.
x = 3

Simplifying
x = 3
Solution
x = {6, 3}