-x^2+x+20=20

Solution for -x^2+x+20=20 equation:

Simplifying
-1x2 + x + 20 = 20

Reorder the terms:
20 + x + -1x2 = 20

Add '-20' to each side of the equation.
20 + x + -20 + -1x2 = 20 + -20

Reorder the terms:
20 + -20 + x + -1x2 = 20 + -20

Combine like terms: 20 + -20 = 0
0 + x + -1x2 = 20 + -20
x + -1x2 = 20 + -20

Combine like terms: 20 + -20 = 0
x + -1x2 = 0

Solving
x + -1x2 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), 'x'.
x(1 + -1x) = 0

Subproblem 1
Set the factor 'x' equal to zero and attempt to solve:

Simplifying
x = 0

Solving
x = 0

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

Simplifying
x = 0
Subproblem 2
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
Solution
x = {0, 1}