Question

A school ordered `3` large boxes of markers. After giving `15` markers to each of `3` teachers, there were `90` markers left

How many markers were originally in each box?

Answer 1

135 markers

Explanation:

Let's call the number of markers in each large box "x."

After giving away 15 markers to each of 3 teachers, there were 90 markers left, so:

x - (15 * 3) = 90

Expanding the expression on the right side:

x - 45 = 90

Adding 45 to both sides:

x = 135

So, each large box originally contained 135 markers.