x = 5/4y + 10
thats the value of x for your graph
move the -5y over to the side of the = that has the 40.. now it is a positive 5y because we had to add it to both sides
then you divide by 4 so you can get just x on one side:::
4x = 5y + 40
----------------
4
so it leaves you with x = 5/4y + 10
