Below is an instruction that describes a task. Write a response that appropriately completes the request in English. Please answer in English.

### Instruction:
A soccer team has three goalies and ten defenders. The team also has twice as many midfielders as defenders, and the rest of the players are strikers. If the team has 40 players, how many strikers are in the team?

### Response:
The team's total number of goalies and defenders is 3+10 = <<3+10=13>>13.
If the team's formation has 2 defenders for every midfielder, then the number of midfielders in the team is twice the number of defenders, which means there are 2*10 = <<2*10=20>>20 defenders in the team.
The total number of players in the team playing the positions of goalies, defenders and midfielders is 20+13 = <<20+13=33>>33
If the team has 40 players, then the number of strikers in the team is 40-33 = <<40-33=7>>7
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