Question

pentru 3 batoane de ciocolata si 5 pachete de biscuiti, Radu a cheltuit 10,50 lei. Pentru doua batoane de ciocolata si 3 pachete de biscuiti de acelasi fel, Mara a platit 6,55 lei. Cate batoane de ciocolata se pot cumpara?

Answer 1

For this case, the first thing we must do is define variables:
x: price for each bar of chocolate.
y: price for each package of cookies.
We write the system of equations:
3x + 5y = 10.50
2x + 3y = 6.55
Solving the system we have:
x = 1.25 lei
y = 1.35 lei
Answer:
Each chocolate bar costs 1.25 lei