Question

Bill had $21 to spend on four avocados.
After buying them he had $13. How
much did each avocado cost?

Answer 1

Altogether :

21 - 13 = 8

For one avocado :


8/4 = 2

For one avocado it costs $2

Answer 2

each avocado costs $2.

21-4x=13
-4x=-8
x=2