Answer:
4
Step-by-step explanation:
All of them are wrong except for the third one
Ok but allow my humble self to use
instead of
.
We have,

If you wanna know what the inverse is swap the values of x and y,

And now solve for y,
.
Hope this helps.
50 is not a perfect square because it doesn’t have a square root.
Hope this helped :)
1.
(x/2) - 7 = 11
2.
2x + 7 = 27
3.
2x - 5 = 25
Hope this helped!! (: