Question

O persoana a cheltuit in trei zile 300lei. Sa se afle cat a cheltuit in fiecare zi , stiind ca in a doua zi a cheltuit doua treimi din cat a cheltuit in
prima zi , iar in a treia zi jumatate din cat a cheltuit a doua zi .

Answer 1

a+b+c=300
b=2/3*a=2a/3
c=b/2=2a/3:2=2a/3*1/2=2a/6=a/3
a+2a/3+a/3=300
3a/3+3a/3=300
6a/3=300
a=300*3/6
a=150 prima zi
b=2*150/3=300/3=100 adoua zi
c=150/3=50 a treia zi