Hi there!
Here are all the steps into solving this equation for "y" :

Multiply each side of the equation by 5 → (3/4) × 5 = 3.75
7 - y = 3.75
Add "y" to each side of the equation → 3.75 + y = 3.75 + y
7 = 3.75 + y
Subtract 3.75 from each side of the equation → 7 - 3.75 = 3.25
3.25 = y
OR

There you go! I really hope this helped, if there's anything just let me know! :)