Hi there!
Great question! :D
We'll start by dividing both sides by 5.
It looks something like this:
[tex] \frac{5y}{5} = \frac{85}{5} [/tex]
[tex]x = 17[/tex]
So, [tex]y = 17[/tex]
When in doubt of the answer, we substitute the variable for the 17 we got.
How?
Since a variable next to a number means to multiply, we'll set up our problem as a multiplication one.
5 × 17 = 85
This is a TRUE statement.
Hope this helps! :D
