Xiao Ming and Xiao Gang collect stamps together. The ratio of the number of stamps of Xiao Ming and Xiao Gang is 6:5. If Xiao Ming gives Xiao Gang nine stamps, the ratio of the number of stamps of the two is 3:4

Xiao Ming and Xiao Gang collect stamps together. The ratio of the number of stamps of Xiao Ming and Xiao Gang is 6:5. If Xiao Ming gives Xiao Gang nine stamps, the ratio of the number of stamps of the two is 3:4

Let Xiaogang be 5x and Xiaoming be 6x
(6x-9):(5x+9)=3:4
3(5x+9)=4(6x-9)
15x+27=24x-36
24x-15x=27+36
9x=63
x=7
Xiao Gang: 7 times 5 = 35 (sheet)
Xiao Ming: 7 times 6 = 42