(0.75x+2)/[(1+0.75)x+2]=5/11
问题描述:
(0.75x+2)/[(1+0.75)x+2]=5/11
怎么解?
答
(0.75x+2)/[(1+0.75)x+2]=5/11
(0.75x+2)/(1.75x+2)=5/11
(1.75x+2)x5=(0.75x+2)x11
8.75x+10=8.25x+22
8.75x-8.25x=22-10
0.5x=12
x=24