(1) If the unit price of the first purchase is X yuan, the unit price of the second purchase is 1. 1x yuan, the first purchase cost 1200 yuan, the second purchase cost 1452 yuan, and the first purchase cost of fruit/kloc-0.

(2) Calculate the number of fruits purchased twice to make money: the number of fruits sold × (actual selling price-current buying price), and then you can answer the questions twice.

explain

Solution:

( 1)

Let the unit price of the first purchase be X yuan.

Second unit price 1. 1x yuan.

According to the meaning of the question:

( 1452/ 1. 1x)-( 1200/x)= 20

Solution:

x=6

X=6 is the solution of the original equation.

(2)

First fruit purchase = 1200÷6=200 (kg).

Second fruit purchase =200+20=220 (Jin).

Making money for the first time =200×(8-6)=400 yuan.

Earn money for the second time =100× (9-6.6)+120× (9× 0.5-6×1) =-12 (yuan)

So make money twice * * * =400- 12=388 (yuan)

A: The first purchase price of fruit is 6 yuan per kilogram. The boss made money twice selling fruit, and * * * made 388 yuan.