x=(x*(x+3))+x-(x+3)

Solution for x=(x*(x+3))+x-(x+3) equation:

Simplifying
x = (x(x + 3)) + x + -1(x + 3)

Reorder the terms:
x = (x(3 + x)) + x + -1(x + 3)
x = ((3 * x + x * x)) + x + -1(x + 3)
x = ((3x + x2)) + x + -1(x + 3)
x = (3x + x2) + x + -1(x + 3)

Remove parenthesis around (3x + x2)
x = 3x + x2 + x + -1(x + 3)

Reorder the terms:
x = 3x + x2 + x + -1(3 + x)
x = 3x + x2 + x + (3 * -1 + x * -1)
x = 3x + x2 + x + (-3 + -1x)

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

Combine like terms: 3x + x = 4x
x = -3 + 4x + -1x + x2

Combine like terms: 4x + -1x = 3x
x = -3 + 3x + x2

Solving
x = -3 + 3x + x2

Solving for variable 'x'.

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

Combine like terms: x + -3x = -2x
3 + -2x + -1x2 = -3 + 3x + x2 + 3 + -3x + -1x2

Reorder the terms:
3 + -2x + -1x2 = -3 + 3 + 3x + -3x + x2 + -1x2

Combine like terms: -3 + 3 = 0
3 + -2x + -1x2 = 0 + 3x + -3x + x2 + -1x2
3 + -2x + -1x2 = 3x + -3x + x2 + -1x2

Combine like terms: 3x + -3x = 0
3 + -2x + -1x2 = 0 + x2 + -1x2
3 + -2x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
3 + -2x + -1x2 = 0

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

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

Simplifying
1 + -1x = 0

Solving
1 + -1x = 0

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

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

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

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

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

Simplifying
x = 1
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 = {1, -3}