Set the total number x

X & lt=300 X+60 >300 240 & ltX & lt=300

2:

Wholesale price: retail price = 1: 1.2

1.2X=60+X

X=300

The second question:

Method 1: (Normal thinking) Assume that basketball needs X yuan and football needs Y yuan, and do the equation:

X+Y=3400

0.85X+0.8Y=3400-600

Solution: X= 1600 Y= 1800.

Method 2: Observe the characteristics.

If there is a 20% discount on both basketball and football, 680 yuan will be saved. Compared with 600 yuan, 80 yuan in the middle is because of the 0.05 discount of basketball. Then, divide 80 by 0.05 to get the price of basketball: 1.600 yuan. Then football is 3400- 1600= 1800 yuan.