设滴灌用水x吨,漫灌用水(1+50%)x,喷灌用水((1+50%)÷(1+20%))x
x+(1+50%)x+((1+50%)÷(1+20%))x=200
x+1.5x+1.25x=200
3.75x=200
x=160/3
漫灌用水
160/3×1.5
=80吨
喷灌用水为
80÷1.2
=200/3吨
设滴灌用水x吨,漫灌用水(1+50%)x,喷灌用水((1+50%)÷(1+20%))x
x+(1+50%)x+((1+50%)÷(1+20%))x=200
x+1.5x+1.25x=200
3.75x=200
x=160/3
漫灌用水
160/3×1.5
=80吨
喷灌用水为
80÷1.2
=200/3吨