PRICE QUANTITY SOLD REVENUE 120 200 120+2 200-2 120+4 200-4 . . 120+x 200-x (120+x)(200-x)
The other person makes so, so many MISTAKES, so this is another one of his responses that you need to IGNORE!!
His equation:MAY get you ONE correct answer (for some STRANGE reason), but not both!
Therefore,.