Răspunsuri

2014-02-07T10:43:13+02:00
M =Mihai
a=Andrei
m+a=140
m=140-a
m-4=a-2
140-a-4=a-2
136-a=a-2
-a-a=-2-136
-2a=-138
a=69  si m=71
2014-02-07T10:45:16+02:00
Andrei are x timbre
Mihai are 140-x timbre
Dupa ce  Mihai da 4 timbre lui Andrei, Andrei va avea x+4 timbre si Mihai 136-x timbre
Deci x+4+2=136-x
De aici obtinem x=65 *atatea timbre are Andrei
Mihai are 140-65=75 timbre