If it's (y / 6) - 3 = -11:
+ 3 + 3
y / 6 = -8
* 6 * 6
y = -48
If it's y / (6 - 3) = -11:
y / 3 = -11
* 3 * 3
y = -33
If there aren't any parenthesis, you use PEMDAS, which means -48 would be the answer because you'd do the division before the subtraction