3+x=4x+12

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


Simplifying
3 + x = 4x + 12

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

Solving
3 + x = 12 + 4x

Solving for variable 'x'.

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

Add '-4x' to each side of the equation.
3 + x + -4x = 12 + 4x + -4x

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

Combine like terms: 4x + -4x = 0
3 + -3x = 12 + 0
3 + -3x = 12

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

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

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

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

Simplifying
x = -3

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