设船有x
15x+9=18(x-1)
15x+9=18x-18
3x=27
x=9
设乙有x
(x/10+19)/(1/3)+x=200
3x/10+57+x=200
13x/10=143
x=143*10/13=110
(110/10+19)/(1/3)=90
设船有x
15x+9=18(x-1)
15x+9=18x-18
3x=27
x=9
设乙有x
(x/10+19)/(1/3)+x=200
3x/10+57+x=200
13x/10=143
x=143*10/13=110
(110/10+19)/(1/3)=90