x+x-4=16

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Solution for x+x-4=16 equation: 


Simplifying
x + x + -4 = 16

Reorder the terms:
-4 + x + x = 16

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

Solving
-4 + 2x = 16

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 = 16 + 4

Combine like terms: -4 + 4 = 0
0 + 2x = 16 + 4
2x = 16 + 4

Combine like terms: 16 + 4 = 20
2x = 20

Divide each side by '2'.
x = 10

Simplifying
x = 10

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