Question

In trei saci sunt mere. In primi doi sunt 72 kg de mere, in ultimi doi 58, iar i primu si ultimul 86. ate kg sunt in fiecare sac?

Answer 1

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