33-21=x-3

Solution for 33-21=x-3 equation:

Simplifying
33 + -21 = x + -3

Combine like terms: 33 + -21 = 12
12 = x + -3

Reorder the terms:
12 = -3 + x

Solving
12 = -3 + 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.
12 + -1x = -3 + x + -1x

Combine like terms: x + -1x = 0
12 + -1x = -3 + 0
12 + -1x = -3

Add '-12' to each side of the equation.
12 + -12 + -1x = -3 + -12

Combine like terms: 12 + -12 = 0
0 + -1x = -3 + -12
-1x = -3 + -12

Combine like terms: -3 + -12 = -15
-1x = -15

Divide each side by '-1'.
x = 15

Simplifying
x = 15