Răspuns :
a=suma de bani
prima oara a cheltuit 3/5 a si i-au ramas 2/5a
a doua oara a cheltuit 2/5·2/5a=4/25a
a-3/5a-4/25a=24 lei
a=100
prima oara a cheltuit 3/5 a si i-au ramas 2/5a
a doua oara a cheltuit 2/5·2/5a=4/25a
a-3/5a-4/25a=24 lei
a=100
1-3/5=2/5
2/5 din 2/5= 2/5 * 2/5 =4/25
4/25=24lei
24 : 4/25= 150 lei avea Dinu
2/5 din 2/5= 2/5 * 2/5 =4/25
4/25=24lei
24 : 4/25= 150 lei avea Dinu