3x-8y=5 find the value if y when x equals 15

To solve for this, we need to plug in 15 for x.

3x - 8y = 5
Plug in 15 for x.
3(15) -8y = 5
45 -8y = 5
Subtract 45 from both sides to solve for x.
45 - 45 = 0
5 -45 = -40
-8y = -40
Divide both sides by -8 to solve for y.
-8y / -8 = y
-40 / -8 = 5

Y = 5 is your answer.

I hope this helps!

(1)the residents of every other house on her street 
(2)the subscribers to a golf magazine 
(3)the people at the computer store at the mall 
this are the answers I hope it helps