Hello and thank you for posting your question to Brainmass.
I am not sure what exactly you mean by saying x-intercept are the same as the coordinates of the y-intercept, since it can mean that the intercept on the x axis has the same distance from the origin as the intercept on the y axis (case 1), or that the intercept point is common to both the y and x axis (case 2). Hence I solve them ...
The equations of lines where the x-coordinate is the same as the y-coordinate are found. The solution is detailed and well presented. The response received a rating of "5" from the student who originally posted the question.