Question

o persoana cheltuieste o suma de bani in 3 zile astfel:in prima zi cheltuieste doua treimi din suma si inca 14 lei, a doua zi cheltuieste 30% din rest,iar a treia zi cheltuieste restul de 28 lei

.a) aflati ce suma a avut initial persoana

b) aflati ce suma a cheltuit persoana in a doua zi

vreau rezolvarea completa.....va multumesk anticipat

Answer 1

3 zile
x- suma initiala

1 zi: x-2x/3-14=S1
2 zi: S1-30S1/100=S2
3 zi: S2=28

2 zi:

S1-30S1=28
S1-3S1/10=28   Amplif cu 10
10S1-3S1=280
7S1=280
S1=280:7
S1=40 in a doua zi a cheltuit 40 lei


1 zi:

x-2x/3-14=40. Amplif cu 3
3x-2x-42=120
x=120+42
x=162. Suma initiala e de 162 de lei.