1X+1.5x1.6=10.

问题描述:

1X+1.5x1.6=10.

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