12x-21=13x

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Solution for 12x-21=13x equation:


Simplifying
12x + -21 = 13x

Reorder the terms:
-21 + 12x = 13x

Solving
-21 + 12x = 13x

Solving for variable 'x'.

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

Add '-13x' to each side of the equation.
-21 + 12x + -13x = 13x + -13x

Combine like terms: 12x + -13x = -1x
-21 + -1x = 13x + -13x

Combine like terms: 13x + -13x = 0
-21 + -1x = 0

Add '21' to each side of the equation.
-21 + 21 + -1x = 0 + 21

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

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

Divide each side by '-1'.
x = -21

Simplifying
x = -21

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