Question

Which mathematical sentence most accurately expresses the information inthe problem below?

Answer 1

We are told that Christine has 9 shinning rings, and that if 5 of them are gold, how many are not gold?

Let the number of the rings that are not gold be n,

Since she has 9 rings and 5 are gold, then the numbers that are not gold which is n becomes

`9\text{ shinning rings - 5 gold rings}`

So,

`n=9-5`

If we bring -5 to meet n, then the minus sign becomes a plus sign, we have

`n+5=9`

Hence, the answer is option D

`n+5=9`