Question

In 3 saci sunt mere. In primii 2 saci sunt 72 kg,in ultimii 2 saci sunt 58 kg,iar in primul si al treilea 86 kg.Cate kg sunt in fiecare sac?

Answer 1

72kg-58kg=14kg (mere al doilea sac)

72kg-14kg=58kg (mere primul sac)

86kg-58kg=28kg (mere ultimul sac)

Answer 2

a+b=72 kg
b+c=58 kg
a+c=86 kg
2a+2b+2c=72kg+58kg+86kg
2(a+b+c)=216 kg
a+b+c=108kg
a+b=72kg
72kg+c=108kg
c=36kg
a+36kg=86kg
a=50kg
50kg+b=72kg
b=22kg