3.9+2+1.9=

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Solution for 3.9+2+1.9= equation: 


Simplifying
3.9 + 2 + 1.9 = 0

Combine like terms: 3.9 + 2 = 5.9
5.9 + 1.9 = 0

Combine like terms: 5.9 + 1.9 = 7.8
7.8 = 0

Solving
7.8 = 0

Couldn't find a variable to solve for.

This equation is invalid, the left and right sides are not equal, therefore there is no solution.

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