x+x+4=12

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Solution for x+x+4=12 equation: 


Simplifying
x + x + 4 = 12

Reorder the terms:
4 + x + x = 12

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

Solving
4 + 2x = 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 + 2x = 12 + -4

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

Combine like terms: 12 + -4 = 8
2x = 8

Divide each side by '2'.
x = 4

Simplifying
x = 4

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