Răspuns :
me+p=5 =>me=5-p
p+ma=8 =>ma=8-p
-------------------
me-ma=?
==============
5-p-(8-p)=
5-p-8+p=
-3 = Diferenta este de 3 kg
p+ma=8 =>ma=8-p
-------------------
me-ma=?
==============
5-p-(8-p)=
5-p-8+p=
-3 = Diferenta este de 3 kg
mere+portocale+mandarine=?
mere+potocale =5kg
portocale+mandarine=8kg
8-5=3kg (dif)
mere+potocale =5kg
portocale+mandarine=8kg
8-5=3kg (dif)