Răspuns :
v+o+c = 63
19+15+c=63
c=63-19-15
c=44-15
c=29
sau
v+o+c=63
19+15+c=63
c=63-(19+15)
c=63-34
c=29
19+15+c=63
c=63-19-15
c=44-15
c=29
sau
v+o+c=63
19+15+c=63
c=63-(19+15)
c=63-34
c=29
cate oi si vaci sunt? mod 1
19+15=34 cate capre sunt? 63-34=29 capre
mod 2
63-(19+15)=29
19+15=34 cate capre sunt? 63-34=29 capre
mod 2
63-(19+15)=29