0.1X/0.03-0.9-0.2X/0.5=1

问题描述:

0.1X/0.03-0.9-0.2X/0.5=1

0.1x/0.03-(0.9-0.2x)/0.7=1
10x/3-(9-2x)/5=1
50x-3(9-2x)=15
50x-27+6x=15
56x=42
x=0.75