Question

dintrun numar natural scadem jumatate.din rest scadem o treime iar din noul rest scadem un sfert si obtinem 75.sa se determine numarul

Answer 1

x-1/2x=y
y-1/3y=z
z-1/4z=75
3/4z=75
3z=75×4
3z=300
z=300÷3
z=100
y-1/3y=100
2/3y=100
2y=300
y=150
x-1/2x=150
1/2x=150
x=150×2
x=300