1/24*(18-2)+(18-X)/36=1求解,

问题描述:

1/24*(18-2)+(18-X)/36=1求解,

解原式:2/3+(18-x)/36=1
72+54-3x=108
-3x=-18
x=6

1/24*(18-2)+(18-X)/36=1
16/24+18/36-x/36=1
8/12+6/12-x/36=1
x/36=14/12-1
x/36=1/6
x=6

设预定时间为x时18*(x-1/3)=14*(x+11/3)18x-6=14x+664x=72x=1818*(18-1/3)=318(千米)答:甲乙两地相距318千米

1/24*(18-2)+(18-X)/36=1
等式两边同时乘以72可得:
3(18-2)+2(18-x)=72
48+36-2x=72
2x=12
x=6

1/24*16+18/36-x/36=1
x/36=2/3+1/2-1
x/36=1/6
x=1/6÷1/36
x=6