Luke sells pins for $4 each and rings for $6 each, Complete the equation which determines the number of pins x and the number of rings y he must sell to make $40

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