Question

What minus 9 equals 11

Answer 1

20

Explanation:

Call the number you're trying to find n.

"What" becomes n.

n - 9 = 11

To "undo" the subtraction and reveal the value of n , ADD 9 to both sides of the equation. (Addition is the inverse operation of subtraction.)

n = 11 + 9 = 20

Answer 2

20

Explanation:

20 - 9 = 11

I hope this helps