2/5X除以1/4=5/6 18X-2.5X=3.1

问题描述:

2/5X除以1/4=5/6 18X-2.5X=3.1

2/5X除以1/4=5/6
2/5X=4*5/6
2/5X=10/3
X=(10/3)*(5/2)
X=25/3
18X-2.5X=3.1
15.5X=3.1
X=3.1/15.5
X=0.2