-x=x^2+x-3

Solution for -x=x^2+x-3 equation:

Simplifying
-1x = x2 + x + -3

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

Solving
-1x = -3 + x + x2

Solving for variable 'x'.

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

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

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

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

Combine like terms: x + -1x = 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}