2、使算式7/8*(X-3/7)/0.625+0.2=1 X=(

问题描述:

2、使算式7/8*(X-3/7)/0.625+0.2=1 X=(

7/8*(X-3/7)/0.625+0.2=1
7/8*(X-3/7)/0.625=0.8
X-3/7=0.8*0.625*8/7
X-3/7=4/7
X=1