Answer :
The time length of the warranty base on the information is 3.3 years.
How to calculate the time length?
Based on the complete information, the time length of the warranty will be:
(x - 7)/1.9 = -1.944
x = 7 - 3.6936
x = 3.3 years.
Therefore, the time length is 3.3 years.
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