Răspuns :
M- MIhai
D - Dan
m+d=78
m=d-16
d-16+d=78
2d=76+18
2d=94
d=94:2
d=47
m=47-16
m=31
D - Dan
m+d=78
m=d-16
d-16+d=78
2d=76+18
2d=94
d=94:2
d=47
m=47-16
m=31
notatii:
a=Mihai,b=Dan
ce stim:
a + b = 78
a=b - 16
b - 16 + b =78
2b =94
b =47
a + 47 =78
a =31
a=Mihai,b=Dan
ce stim:
a + b = 78
a=b - 16
b - 16 + b =78
2b =94
b =47
a + 47 =78
a =31