-12=x+21

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Solution for -12=x+21 equation:


Simplifying
-12 = x + 21

Reorder the terms:
-12 = 21 + x

Solving
-12 = 21 + 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 = 21 + x + -1x

Combine like terms: x + -1x = 0
-12 + -1x = 21 + 0
-12 + -1x = 21

Add '12' to each side of the equation.
-12 + 12 + -1x = 21 + 12

Combine like terms: -12 + 12 = 0
0 + -1x = 21 + 12
-1x = 21 + 12

Combine like terms: 21 + 12 = 33
-1x = 33

Divide each side by '-1'.
x = -33

Simplifying
x = -33

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