Answer :
Work out the equation backward.
22-4=18
18/2=9
The original number was 9
22-4=18
18/2=9
The original number was 9
i would do it backwards, so, instead of adding, you would subtract
22-4=18
then instead of multiplying divide
18/2=9
so the answer is 9
22-4=18
then instead of multiplying divide
18/2=9
so the answer is 9