Răspunsuri

2014-11-12T19:55:26+02:00
5*4=20; 5*4+1=21; 5*4+2=22; 5*4+3=23; 5*4+4=24; 5*4+5=25; 5*4+6=26; 5*4+7=27; 5*4+8=28; 5*4+9=29
2014-11-12T19:57:48+02:00
A-numarul natural necunoscut
a:4=5 rest b
(Stiind ca restul trebuie sa fie intotdeauna mai mic decat impartitorul) - b<4
=> b=0,1,2,3
(Acum inlocuim)
a=4x5+0=>a=20
a=4x5+1=>a=21
a=4x5+2=>a=22
a=4x5+3=>a=23

a=20,21,22,23