3x+12=3x-42

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Solution for 3x+12=3x-42 equation: 


Simplifying
3x + 12 = 3x + -42

Reorder the terms:
12 + 3x = 3x + -42

Reorder the terms:
12 + 3x = -42 + 3x

Add '-3x' to each side of the equation.
12 + 3x + -3x = -42 + 3x + -3x

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

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

Solving
12 = -42

Couldn't find a variable to solve for.

This equation is invalid, the left and right sides are not equal, therefore there is no solution.

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