x+x+y=18

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Solution for x+x+y=18 equation: 


Simplifying
x + x + y = 18

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

Solving
2x + y = 18

Solving for variable 'x'.

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

Add '-1y' to each side of the equation.
2x + y + -1y = 18 + -1y

Combine like terms: y + -1y = 0
2x + 0 = 18 + -1y
2x = 18 + -1y

Divide each side by '2'.
x = 9 + -0.5y

Simplifying
x = 9 + -0.5y

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