1X+1.5x1.6=10.
问题描述：
1X+1.5x1.6=10.
答
2.1X + 1.5×1.6 = 10.8
2.1X + 2.4 = 10.8
2.1X = 10.8 - 2.4
2.1X = 8.4
X = 8.4 ÷ 2.1
X = 4