The wire left is 16 1/2 meters.
From the information 7/2 wire is cut from piece of wire that is 2 piece of 10 meters.
Therefore, the wire that will be left will be:
= (2 × 10) - 7/2
= 20 - 7/2
= 20 - 3 1/2
= 16 1/2 meter
The wire left is 16 1/2 meters.
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