0+50x1-60-60x0+10. Even though PEMDAS is a standardized mechanical method, you ALWAYS perform addition and multiplication left-to-right. Therefore you would start by adding 0+50 because it is done left-to-right. Then, you are left with 50-60-60x0+10. Next, you multiply 60x0, because, once again, it is performed left-to-right. Now you have left 50-60-0+10. Then, you add 0+10 because of the left-to-right rule. Now, you are left with 50-60-10. Naturally, left-right subraction occurs. 50-60=(-10) and (-10)-10=(-20).
0+50x1-60-60x0+10=(-20)
-Dan Withers; retired mathematician, Professor from Harvard University.