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?

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