Răspuns :
Ionela- x
Irina- x-13
Fie Ionela x si Irina x-13
x+x-13=89
2x=89+13
2x=102
x=102:2
x=51
Ionela…x=51
Irina…x-13=51-13=38
Raspuns: Ionela are 51 bomboane iar Irina are 38
Irina- x-13
Fie Ionela x si Irina x-13
x+x-13=89
2x=89+13
2x=102
x=102:2
x=51
Ionela…x=51
Irina…x-13=51-13=38
Raspuns: Ionela are 51 bomboane iar Irina are 38