Răspuns :
Fie x.y cele 2 numere
x+y=x+135=>x-x+y=135=>y=135
x+y=y+28
x+135=135+28
x=135+28-135=28
x+y=135+28=163
x+y=x+135=>x-x+y=135=>y=135
x+y=y+28
x+135=135+28
x=135+28-135=28
x+y=135+28=163