Răspuns :
a=varsta tatalui
b =varsta celuilalt
a+b=48
a> 30
avem cazul cand
a∈ {31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47)
b∈{1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17}
b =varsta celuilalt
a+b=48
a> 30
avem cazul cand
a∈ {31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47)
b∈{1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17}