Answer with explanation:
Number of Apples Possessed by Davis = 10
Number of Apple ate by Gus

Number of Apple bought by Davis next day
=Twice the Amount ate by Gus
= 2 × 2
=4
So, total number of Apples left with David
=10 -( Number of Apple ate by Gus)+( Number of Apple Bought by Davis next day )
=10 - 2 +4
=8+4
= 12 Apples