X+6.4=3.9

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Solution for X+6.4=3.9 equation: 


Simplifying
X + 6.4 = 3.9

Reorder the terms:
6.4 + X = 3.9

Solving
6.4 + X = 3.9

Solving for variable 'X'.

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

Add '-6.4' to each side of the equation.
6.4 + -6.4 + X = 3.9 + -6.4

Combine like terms: 6.4 + -6.4 = 0.0
0.0 + X = 3.9 + -6.4
X = 3.9 + -6.4

Combine like terms: 3.9 + -6.4 = -2.5
X = -2.5

Simplifying
X = -2.5

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