How do you graph #-2x+5y=15#?
That is a line; plot any two points on it.
(x, y) lies on the line
if and only if the values of x and y solve the equation. That is, they make it true.
If you are using paper (and not a computer), two of the easiest points to find are the intercepts.
A graph has an x-intercept when y = 0.
When y = 0 in this case,
This means that
I'll leave the rest to you. Find the y-intercept by determining the point where x = 0.