A father counts that there are 16 granola bars in the cupboard before he goes to the store. He buys x number of boxes of granola bars and adds them to the cupboard. He counts that there are now 36 granola bars in the cupboard.

Question

A father counts that there are 16 granola bars in the cupboard before he goes to the store. He buys x number of boxes of granola bars and adds them to the cupboard. He counts that there are now 36 granola bars in the cupboard.

If the boxes have 4 bars in each of them, how many boxes of granola bars did he buy?

If the boxes have 5 bars in each of them, how many boxes of granola bars did he buy?

Which expression could the father use to show the total number of granola bars in the cupboard if each box had 10 granola bars in it?

Answer 1

If each box has 4 bars in it, the father buys (36-16)/4 = <<(36-16)/4=5>>5 boxes of granola bars.

If each box has 5 bars in it, the father buys (36-16)/5 = <<(36-16)/5=4>>4 boxes of granola bars.
If each box has 10 bars in it, the total number of granola bars in the cupboard can be shown using the expression 16 + 10x, where x is the number of boxes.