A number x is multiplied by 7, and this product is then divided by 5. If the positive square root of the result of these two operations equals x, what is the value of x if x≠0 ? Options:
A) 25/9  B) 9/5  C) 5/3  D) 7/5  E) 9/25
sqrt(7x/5) to be perfect square x has to 7/5   Ans: 7/5
<result>D</result>
A number x is multiplied by 7, and this product is then divided by 5. If the positive square root of the result of these two operations equals x, what is the value of x if x≠0 ?