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?

Which could be used as a general equation to calculate the total number of granola bars in the cupboard after the father goes to the store?

Answer 1

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

The expression the father could use to show the total number of granola bars in the cupboard if each box had 10 granola bars in it is 10*x + 16.

A general equation to calculate the total number of granola bars in the cupboard after the father goes to the store is 4*x + 16.