x+x+4=18

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Solution for x+x+4=18 equation: 


Simplifying
x + x + 4 = 18

Reorder the terms:
4 + x + x = 18

Combine like terms: x + x = 2x
4 + 2x = 18

Solving
4 + 2x = 18

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 = 18 + -4

Combine like terms: 4 + -4 = 0
0 + 2x = 18 + -4
2x = 18 + -4

Combine like terms: 18 + -4 = 14
2x = 14

Divide each side by '2'.
x = 7

Simplifying
x = 7

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