3x-12=4+x

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


Simplifying
3x + -12 = 4 + x

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

Solving
-12 + 3x = 4 + x

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
-12 + 3x + -1x = 4 + x + -1x

Combine like terms: 3x + -1x = 2x
-12 + 2x = 4 + x + -1x

Combine like terms: x + -1x = 0
-12 + 2x = 4 + 0
-12 + 2x = 4

Add '12' to each side of the equation.
-12 + 12 + 2x = 4 + 12

Combine like terms: -12 + 12 = 0
0 + 2x = 4 + 12
2x = 4 + 12

Combine like terms: 4 + 12 = 16
2x = 16

Divide each side by '2'.
x = 8

Simplifying
x = 8

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