甲、乙两数的和是14.8,甲数增大2.5,乙数减少0.5,甲数是乙数的三倍,甲、乙两数原来各是
10.1,4.7要算式哦x + a =14.8,(x + 2.5)/( a - 0.5) = 3解出方程x=10.1,a=4.7