-21-1=X

Solution for -21-1=X equation:

Simplifying
-21 + -1 = X

Combine like terms: -21 + -1 = -22
-22 = X

Solving
-22 = X

Solving for variable 'X'.

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

Add '-1X' to each side of the equation.
-22 + -1X = X + -1X

Combine like terms: X + -1X = 0
-22 + -1X = 0

Add '22' to each side of the equation.
-22 + 22 + -1X = 0 + 22

Combine like terms: -22 + 22 = 0
0 + -1X = 0 + 22
-1X = 0 + 22

Combine like terms: 0 + 22 = 22
-1X = 22

Divide each side by '-1'.
X = -22

Simplifying
X = -22