Question

Determinati numerele naturale y stiind ca y-5| si 10

Answer 1

y - 5 | 10 => y = 15, 25, 35 ..

y = n×10 + 5, unde n ∈ N*

Answer 2

Răspuns:

y-5|10=>y-5€M10={10,20.....}=>y€{5,15......}