设乙运3x千克,则甲运x+152(千克）,丙运2x（千克）3x+x+152+2x=(x+152)÷2/56x+152=(x+152)×5/2两边同乘以212x+304=5(x+152)12x+304=5x+76012x-5x=760-3047x=456x=456/7即：乙运3×456/7=1368/7（千克）,则甲运456/7...