Question

daca se aseaza 2 elevi in banca raman 6 elevi in picioare,iar daca se aseaza 3 eleviin banca raman 3 banci libere.
Cati elevi si cate banci sunt?
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Answer 1

E=2*b+6
B=e/3+3
E=2*(e/3+3)+6
E=2e/3+6+6
E-2/3e=12
1/3e=12
E=12*3=36
B=15
Raspuns:
15 banci
36 elevi