3+4x=12x-42

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Solution for 3+4x=12x-42 equation:


Simplifying
3 + 4x = 12x + -42

Reorder the terms:
3 + 4x = -42 + 12x

Solving
3 + 4x = -42 + 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.
3 + 4x + -12x = -42 + 12x + -12x

Combine like terms: 4x + -12x = -8x
3 + -8x = -42 + 12x + -12x

Combine like terms: 12x + -12x = 0
3 + -8x = -42 + 0
3 + -8x = -42

Add '-3' to each side of the equation.
3 + -3 + -8x = -42 + -3

Combine like terms: 3 + -3 = 0
0 + -8x = -42 + -3
-8x = -42 + -3

Combine like terms: -42 + -3 = -45
-8x = -45

Divide each side by '-8'.
x = 5.625

Simplifying
x = 5.625

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