how can I solve this equation?

Question

7/12 - ◊/12 = 1/6 the diamond stands for a number I have to fill in

 

Answer 1

7/12-O/12=1/6

-O/12=1/6-7/12

 

1/6-7/12=-5/12

 

-O/12=-5/12

 

O=5

 

I used O instead of diamond, I hope it does not confuse you.