The owner of Lili clothing store bought three pairs of trousers and five tops, totaling 804 yuan. Two days later, she entered the same four.
Four pairs of trousers and four coats are 752 yuan, so the total price of one pair of trousers and one coat is 752/4= 188 yuan.
804 yuan for three pairs of trousers and five coats minus 188*3=240 yuan is the price of two coats, so one coat is 120 yuan. Then add 188- 120=68 yuan, which is the price of a pair of trousers!