Răspuns:
160-4×(15+5×(265-4×65)
160-4×(15+5×(265-260)
160-4×(15+5×5)
160-4×(15+25)
160-4×40
160-160
=0
160-4x[15+5x(265-4x65) ]
160-4x[15+5x(265-260) ]
160-4x(15+5x5)
160-4x(15+25)
160-4x40
0
Sper ca team ajutat!
