So, 10%-7%=3%=$294
$294/3%=$9800
Answer: The cost price of the necklace is $9800.
I dont know why but a moderator deleted my answer but I hope that you got it. It was actually A. since it was the quotient of 9 not the quotient of x.
Have a great day hon and I hope that this helped you out a lil:)
180, is the answer because when I had a question like that you have to add