Răspuns :
a+a:2=27
a:2=27:3
a:2=9 cornulete a facut Dana
a=9*2
a=18 cornulete a facut bunica
18+18:2=
=18+9
=27 cornulete in total
a:2=27:3
a:2=9 cornulete a facut Dana
a=9*2
a=18 cornulete a facut bunica
18+18:2=
=18+9
=27 cornulete in total