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Plugging in numbers seems to me to be a time-consuming way to answer the question. If, looking at answer A, y/w = z/x, then cross-multiplying we have yx = wz. You can do the same for every answer choice, and, with the exception of answer D, each gives the equation yx = wz. So D is not equivalent to the rest.Strongt wrote:18. w, x, y, and z are all positive integers. Which of the following proportions is NOT equivalent to the others?
a. y/w = z/x
b. z/y = x/w
c. w/y=x/z
d. w/z = x/y
e. x/w = z/y
i tried plugin' in numbers but didnt manage to get the answer...
answer is D
Perhaps you made an arithmetic error.Strongt wrote:18. w, x, y, and z are all positive integers. Which of the following proportions is NOT equivalent to the others?
a. y/w = z/x
b. z/y = x/w
c. w/y=x/z
d. w/z = x/y
e. x/w = z/y
i tried plugin' in numbers but didnt manage to get the answer...
answer is D
