This number is 90.

2. Solution: X gel pens and 5x pencils (330-x-5x) are provided.

1.5x+0.54×5x+4.8(330-x-5x)= 344

X= 1240/24.6 (non-integer)

Other required matters.

3. Solution: For every X adults, there are (50-x) villains.

2x+ 1/2(50-x)=28

x=2 50-x=48

Answer: If there are two adults, it is 48 villains.

Solution: This product is priced at X yuan each.

8×0.85 x =(x-35)× 12-(x-45)×4

x=200

A: Each price of this commodity is 200 yuan.