-3.9+3.9=

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Solution for -3.9+3.9= equation: 


Simplifying
-3.9 + 3.9 = 0

Combine like terms: -3.9 + 3.9 = 0.0
0.0 = 0

Solving
0.0 = 0

Couldn't find a variable to solve for.

This equation is an identity, all real numbers are solutions.

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