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determina ''y'' in calcul: 12×13×y×15×16=13×14×4×5×3×16×3.

Răspuns :

y=(13*14*4*5*3*16*3):(12*13*15*16)
y=14

156*y*240=524160
37440*y=524160
y=524160/37440
y=14