PSAT Math Grid-Ins Question 28: Answer and Explanation
Question: 28
If x ≠ 0 and 5x = 7y, what is the value of 
?
Correct Answer: 2/7 or .285 or .286
Explanation:
, .285, or .286
The question asks for the value of an expression. There are related variables in the question, so plug in numbers that make the equation 5x = 7y true. Make x = 7 and y = 5, so the equation becomes 5(7) = 7(5). Next, plug x = 7 and y = 5 into the expression to get 
= 
. The correct answer can be entered as , .285, or .286.
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