Question

A group of 9 students shared a box of pen. After they had taken 7 pens each, there were 6 pens left. How many pens were at first?

Answer 1

Let the number of pens at first be x.

The number of pens that the group of 9 students took is: 9 x 7 = 63

The number of pens left: x - 63 = 6 => x = 69

Thus, at first there were 69 pens.

Answer 2

Let the number of pens at first be x.

The number of pens that the group of 9 students took is: 9 x 7 = 63

The number of pens left: x - 63 = 6 => x = 69

Thus, at first there were 69 pens