Math question answer

Question

how to get 20 with 3,7,12,2

Answer 1

The following expression is equivalent to 20:

3 - 7 + 12 * 2

Using the correct order of operations, you would evaluate 12* 2 or 24 first; then start with 3 - 7 and add 24:

3 - 7 + 12 * 2 =

3 - 7 + 24 =

-4 + 24 =

20