Answer:
N + 7 = 12
Step-by-step explanation:
When you have a number minus a negative number, it's the same as addition.
If you want me to solve for "Y" then, the answer will be,

ir if you want me to solve for "X" instead then the answer will be,

Divide 6 by 11: 6/11=.5454545 :)
7x / 8 = 21
7x = 8*21
x = 24