x+x+x+x=12

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


Simplifying
x + x + x + x = 12

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

Combine like terms: 2x + x = 3x
3x + x = 12

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

Solving
4x = 12

Solving for variable 'x'.

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

Divide each side by '4'.
x = 3

Simplifying
x = 3

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