Can someone help a friend

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?

At the electronics store you have a coupon for 20% off up to 2 cds you buy for cds with the original cost of $10.99 each the sales tax is 5% what is the total cost of your purchase

Evaluate 8j -k+148j−k+14 when j=0.25j=0.25 and k=1k=1.