Which simpler problems could be calculated to solve this problem? three people went to lunch and agreed to share the cost equally. george's meal cost $6.75, david's meal cost $4.25, and liz's meal cost $5.50. they agreed to leave an 18% tip. how much did each person pay?

When george started his current job, his employer told him that at the end of the first year, he would receive two vacation days. after each year worked, his number of vacation days will double up to five work weeks (25days) of payed vacation. how many vacation days will he have in 4 years