Solve 5.2g+10=3.2g+18

Will mark brainliest for right answer

Including 6% sales tax, an inn charges $135.68 per night. find the inns nightly cost

Can someone explain to me how to do

Melanie is buying a bathing suit that costs 39.99. she is given a discount at the cash register of $6.00 when she scratched 15% off on a game piece for a store promotion. what will the sale price of melanie’s bathing suit be?