Question

the sum of certain number and 9 is 11​

Answer 1

Answer:

let the certain number be x

then the other number is 9

the sum of these two numbers are 11

the equation= x+9=11

                     = x=11-9

                     = x=2

therefore the certain number will be 2.

Step-by-step explanation:

So simple sum

Mark Brainliest