X+3n=18

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Solution for X+3n=18 equation: 


Simplifying
X + 3n = 18

Solving
X + 3n = 18

Solving for variable 'X'.

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

Add '-3n' to each side of the equation.
X + 3n + -3n = 18 + -3n

Combine like terms: 3n + -3n = 0
X + 0 = 18 + -3n
X = 18 + -3n

Simplifying
X = 18 + -3n

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