See attachment for math work and answer.
Answer:
1050 fish
Step-by-step explanation:
175(6 tanks) = 1050
5
16 + 11x = 71
16 + -16 + 11x = 71 + -16
16 + -16 = 0
0 + 11x = 71 + -16
11x = 71 + -16
11x = 55
x = 5
10
5 trees * 2 from each = 10 apples