Question

A number decreased by 9 is 12. Which equation represents this situation?

Answer 1

_ - 9 = 12

Explanation:

You can identify the starting number by adding 9 and 12 together to get 21. The completed equation would be 21 - 9 = 12.

Answer 2

x - 9 = 12

Explanation:

We can use x as "a number"

So the equation so far is just "a number", or x.

Decreased by 9 can also be said as subtracted by 9, so that makes the equation x - 9.

"is 12" can also be said as equals 12, which makes the equation x - 9 = 12