Idk how to do "solve 7x+4y=8 for y."

7x + 4y =8
If this is the only equation given, the best we can do is solve for y in terms of x.

First, subtract 7x from both sides:
4y = 8-7x

Now divide by 4 to solve for y

Y= (8-7x)/4

I hope this Helps and is what you're looking for!