Juan spent at most $2.50 on apples and oranges. He bought 5 apples at $0.36 each. What is the most h

Juan spent at most $2.50 on apples and oranges. He bought 5 apples at $0.36 each. What is the most he spent on oranges?

Let a be spending apples and o be spending on oranges, we have:

1. a + o <= 2.36 <-- At most means less than or equal to
2. a = 5 * 0.36 = 1.8

Substitute (2) into (1)
1.8 + o <= 2.36

Subtract 1.8 from each side
o <= 0.56