Which is the correct first step -3x+2-5x-7=4x+2

While scuba diving, rajeev dove to a depth of 12.6 feet below the surface of the water and then descended another 8.7 feet. what expression can be used to find rajeev's new position? 12.6 – 8.7 –12.6 – 8.7 –12.6 – (–8.7) 12.6 – (–8.7)

At a sale this week, a desk is being sold for $213. this is a 29% discount from the original price. what is the original price?

Having a hard time understanding this question (see attachment).