X-3.9=14.2

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Solution for X-3.9=14.2 equation: 


Simplifying
X + -3.9 = 14.2

Reorder the terms:
-3.9 + X = 14.2

Solving
-3.9 + X = 14.2

Solving for variable 'X'.

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

Add '3.9' to each side of the equation.
-3.9 + 3.9 + X = 14.2 + 3.9

Combine like terms: -3.9 + 3.9 = 0.0
0.0 + X = 14.2 + 3.9
X = 14.2 + 3.9

Combine like terms: 14.2 + 3.9 = 18.1
X = 18.1

Simplifying
X = 18.1

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