x^2+9x+18=x+3

Solution for x^2+9x+18=x+3 equation:

Simplifying
x2 + 9x + 18 = x + 3

Reorder the terms:
18 + 9x + x2 = x + 3

Reorder the terms:
18 + 9x + x2 = 3 + x

Solving
18 + 9x + x2 = 3 + x

Solving for variable 'x'.

Reorder the terms:
18 + -3 + 9x + -1x + x2 = 3 + x + -3 + -1x

Combine like terms: 18 + -3 = 15
15 + 9x + -1x + x2 = 3 + x + -3 + -1x

Combine like terms: 9x + -1x = 8x
15 + 8x + x2 = 3 + x + -3 + -1x

Reorder the terms:
15 + 8x + x2 = 3 + -3 + x + -1x

Combine like terms: 3 + -3 = 0
15 + 8x + x2 = 0 + x + -1x
15 + 8x + x2 = x + -1x

Combine like terms: x + -1x = 0
15 + 8x + x2 = 0

Factor a trinomial.
(5 + x)(3 + x) = 0

Subproblem 1
Set the factor '(5 + x)' equal to zero and attempt to solve:

Simplifying
5 + x = 0

Solving
5 + x = 0

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

Add '-5' to each side of the equation.
5 + -5 + x = 0 + -5

Combine like terms: 5 + -5 = 0
0 + x = 0 + -5
x = 0 + -5

Combine like terms: 0 + -5 = -5
x = -5

Simplifying
x = -5
Subproblem 2
Set the factor '(3 + x)' equal to zero and attempt to solve:

Simplifying
3 + x = 0

Solving
3 + x = 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 + x = 0 + -3

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

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

Simplifying
x = -3
Solution
x = {-5, -3}