Use addition or substitution to find the value of y for this set of equations. 2x - 3y = -15
x = 4y what is the value of y

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

Money off coupons have been circulated to 300 households. only 2/5 of these were redeemed (used) in the local supermarket to get a free shampoo. what fraction of coupons were unused? (ps: write how you got the answer)

Jim had 15 minutes to do 5 laps around his school what would his time be