甲乙两车共运一堆煤,运完时,甲车运了总数的7/15多2吨,比乙车多运1/2,设甲车运了x吨 乙车运了 x ÷ ( 1+1/2) = 2x/3 x = 7 (x+2x/3) / 15 + 215x -30 = 7x + 14x/38 x -30 = 14x/324x -90 =14x10x = 90x= 9...