Joanie believes that you cannot use cross products to solve the proportion for x. She says that if you multiply both sides of the equation by x, you get Then, if you multiply both sides of the equation by 3, you get, which is a different equation than you would get if you cross multiplied. What mistake did Joanie make in her reasoning?
She assumed that 50x = 75 is the equation that you get if you multiply both sides of the equation 50x/3 = 75 by 3. In short, the answer is C/the third option.
