设甲数是x 则乙数是158-x
1/3 x-1/4(158-x)=3
1/3 x-39.5+1/4 x=3
1/3x+1/4x=39.5+3
7/12x=42.5
x=510/7
158-510/7=596/7
答:甲数是510/7 则乙数是596/7
设甲数是x 则乙数是158-x
1/3 x-1/4(158-x)=3
1/3 x-39.5+1/4 x=3
1/3x+1/4x=39.5+3
7/12x=42.5
x=510/7
158-510/7=596/7
答:甲数是510/7 则乙数是596/7