X+3x-3x+3=18

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Solution for X+3x-3x+3=18 equation: 


Simplifying
X + 3x + -3x + 3 = 18

Reorder the terms:
3 + X + 3x + -3x = 18

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

Solving
3 + X = 18

Solving for variable 'X'.

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

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

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

Combine like terms: 18 + -3 = 15
X = 15

Simplifying
X = 15

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