9x-42=12x-84

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Solution for 9x-42=12x-84 equation:


Simplifying
9x + -42 = 12x + -84

Reorder the terms:
-42 + 9x = 12x + -84

Reorder the terms:
-42 + 9x = -84 + 12x

Solving
-42 + 9x = -84 + 12x

Solving for variable 'x'.

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

Add '-12x' to each side of the equation.
-42 + 9x + -12x = -84 + 12x + -12x

Combine like terms: 9x + -12x = -3x
-42 + -3x = -84 + 12x + -12x

Combine like terms: 12x + -12x = 0
-42 + -3x = -84 + 0
-42 + -3x = -84

Add '42' to each side of the equation.
-42 + 42 + -3x = -84 + 42

Combine like terms: -42 + 42 = 0
0 + -3x = -84 + 42
-3x = -84 + 42

Combine like terms: -84 + 42 = -42
-3x = -42

Divide each side by '-3'.
x = 14

Simplifying
x = 14

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