Question

Daca adunam 15 la suma dintre sfertul treimea si jumatatea unui numar natural obtinem 2017 . Aflati numarul

Answer 1

Notez cu x-nr.
15+x/4+x/3+x/2=2017
N.C=12
15*12+3x+4x+6x=2017*12
15*12+13x=2017*12
13x=2017*12-15*12
13x=12(2017-15)
13x=12*2002
x=12*2002/13
x=12*154
x=1848

Answer 2

15 + (n : 4 + n: 3 + n : 2) = 2017
n : 4 + n : 3 + n : 2 = 2017-15
n : 4 + n : 3 + n : 2 = 2002 |×12
3×n + 4×n + 6×n = 24024
13×n = 24024
n = 24024 : 13
n = 1848 (numarul)