b-kg banane
p-kg portocale
14b+8p=86lei
22b+24p=158
Simplifici totul cu 2 si obtii:
[tex] \left \{ {{7b+4p=43| ori 3 \atop {11b+12p=79| ori (-1)}} \right. [/tex]
[tex] \left \{ {{21b+12p=129} \atop {-11b-12p= -79} \right. [/tex]
10b / =50 -----> b=5lei
7b+4p=43
7ori 5 +4p=43
35+4p=43
4p=8
p=2lei
3b+p=3ori5+2=17lei
