500*0.95=(500+X)*0.75
问题描述:
500*0.95=(500+X)*0.75
答
500*0.95=(500+X)*0.75
500*19=(500+x)*15
15x=500*(19-15)=2000
x=2000/15=400/3
x=400/3
答
0.75x=500*0.95-500*0.75
0.75x=100
x=400/3