human
Alex has some new shirts. Joe has 3 more new shirts than Alex. Ben has eight more new shirts than Joe. If Ben has 15 new shirts, how many new shirts does Alex have?
assistant
How many new shirts does Joe have? ** Joe has 15-8=<<15-8=7>>7 new shirts.
How many new shirts does Alex have? ** Alex has 7-3=<<7-3=4>>4 new shirts.
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