Răspuns :
I mod
balon- 7 lei
5 baloane rosii- 7*5= 35 lei
4 baloane galbene- 4*7=28 lei
In total: 35+28=63 lei
II mod
x- numar total de lei
x= 7*5+4*7=63
balon- 7 lei
5 baloane rosii- 7*5= 35 lei
4 baloane galbene- 4*7=28 lei
In total: 35+28=63 lei
II mod
x- numar total de lei
x= 7*5+4*7=63
I mod:(4x7)+(5x7)=28+35=63 lei in total
II mod:7(4+5)=7x9=63 lei in total
II mod:7(4+5)=7x9=63 lei in total