x-4+3x=12

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


Simplifying
x + -4 + 3x = 12

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

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

Solving
-4 + 4x = 12

Solving for variable 'x'.

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

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

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

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

Divide each side by '4'.
x = 4

Simplifying
x = 4

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