x+x-4=8

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Solution for x+x-4=8 equation: 


Simplifying
x + x + -4 = 8

Reorder the terms:
-4 + x + x = 8

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

Solving
-4 + 2x = 8

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 = 8 + 4

Combine like terms: -4 + 4 = 0
0 + 2x = 8 + 4
2x = 8 + 4

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

Divide each side by '2'.
x = 6

Simplifying
x = 6

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