✔ 最佳答案
(1) Assume that Curtis carry 3x kg,
then Ben carries twice as much as curtis, which is 6x kg
Alex carries 1/3 of what ben carries, which is 2x...
therefore 3x + 6x + 2x = 77kg
11 x = 77kg
x = 7kg
Ben carries 6x, which is 42 kg
(2)
Assume that Alan sell x records and Anita sell y records
therefore x + y = 129 (since the total number of records sold = 129)
110x + 95y = 12615 (total sales volume)
since x + y = 129 (multiple both side by 95)
95x + 95y = 12255
recall sales volume....
110x + 95y = 12615
15x + 95x + 95y = 12615 (but 95x + 95y = 12255)
15x + 12255 = 12615
15x = 360
x = 24
therefore y = 105
i.e. alan sold 24 records and anita sole 105 records
