1. A school ordered 3 large boxes of board markers. After giving 15 markers to each of 3
teachers, there were 90 markers left. The diagram represents the situation. How many
markers were originally in each box?
There was 45 markers originally in each box. How do we know? Well, 3*x = 15*3 + 90 = 45 + 90 = 135 Divide both of the sides by 3 X = 135/3 = 45 Therefore, that’s how we know that there was 45 markers originally.
