Question

Donna, Alonzo, and Kevin served a total of 85 orders Monday at the school cafeteria. Donna served 10 fewer orders than Alonzo. Kevin served 3 times as

many orders as Alonzo. How many orders did they each serve?

Answer 1

So, Donna served 9, Alonzo served 19 and kevin served 57 orders.

Explanation:

Let orders be :

Donna - x, Alonzo - y, Kevin - z

x = y - 10 - eqn i

z = 3y - eqn ii

Now, By the question,

x + y + z = 85

we know from eqn i and eqn ii,

y - 10 + y + 3y = 85

or, 5y = 95

so, y = 19

Now,

z = 3(19) = 57

x = 19 - 10 = 9