Question

Solve each equation. Check your solution. A number increased by 21 is 28. Find the number.

Answer 1

The correct answer is 7.

Here's how I got my answer:

In order to find the "number", we would need to find the difference between the two numbers. We can do this by doing $28-21$, which is your answer, 7.

Example: To find the difference of 20 and 40, we would need to do $40-20$, which is 20.

Answer 2

7 twenty eight minus twenty one equal 7