Question

află nr necunoscut:b•d-16=2•5•4

Answer 1

b×d-16=2×5×4
b×d=40+16
b×d=56
avem 2 necunoscute
scriem 56  ca produs de 2 numere
56=1×56       
56=2× 28
56=4× 14
56=7×8
56=8×7
56=14×4
56=28×2
56=56×1
b={1,2,4,7,8,14,28,56}
d={56,28,14,8,7,4,2,1}