X+3X+6=18

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Solution for X+3X+6=18 equation: 


Simplifying
X + 3X + 6 = 18

Reorder the terms:
6 + X + 3X = 18

Combine like terms: X + 3X = 4X
6 + 4X = 18

Solving
6 + 4X = 18

Solving for variable 'X'.

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

Add '-6' to each side of the equation.
6 + -6 + 4X = 18 + -6

Combine like terms: 6 + -6 = 0
0 + 4X = 18 + -6
4X = 18 + -6

Combine like terms: 18 + -6 = 12
4X = 12

Divide each side by '4'.
X = 3

Simplifying
X = 3

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