2.3*4.6 - 2.3x = 4.14 10.58 - 2.3x = 4.14 2.3x = 10.58 - 4.14 2.3x = 6.44 x = 2.8 另4.6 - x = 1.8 x = 4.6-1.8 x = 2.8 (这个方法比较简单)
