Question 81665
When you plug in any y value and then solve for x, you are a point that is on the line {{{5y-3x=15}}}. So when you plug in y=6 and find x=5, that means the point (5,6) is on the line {{{5y-3x=15}}}. What's probably throwing you off is that you're doing this backwards where you plugged in x to find y before.