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?
Joe has 15-8=<<15-8=7>>7 new shirts.
Alex has 7-3=<<7-3=4>>4 new shirts.
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Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
You are solving math problems. Here are some examples of how to solve the task:

Tyler has $100. If he buys 8 scissors for $5 each and 10 erasers for $4 each, how much of his money remains?8 * $5 = $<<8*5=40>>40 is the price of 8 scissors.
10 * $4 = $<<10*4=40>>40 is the price of 10 erasers.
You can find the total price by adding the cost of the scissors and erasers: $40 + $40 = $<<40+40=80>>80
$100 - $80 = $<<100-80=20>>20 is the remaining amount of his money.
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Gerald had 20 toy cars. He donated 1/4 of his toy cars to an orphanage. How many toy cars does Gerald have left?Gerald gave away 20 x 1/4 = <<20*1/4=5>>5 of his toy cars.
Therefore, he is left with 20 - 5 = <<20-5=15>>15 toy cars.
#### 15[END]

Now, solve this next question in the style of the above examples:

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?

### Response:
Joe has 15-8=<<15-8=7>>7 new shirts.
Alex has 7-3=<<7-3=4>>4 new shirts.
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