a person sold an article at a profit of 15% if he sold it for rs 81 less in then his loss would have been 12% find the CP of the article ​

Which one ? is the answer and how to find this answer

What ia the sum if the first 7 terms of the geometric series

Macy spent $36 on jeans. this was $12 less than twice what she spent on a shirt. which equation to solve this, 12x=36 2x=36-12 2x-12=36 12-2x=36