Valerie has $1 and then earns $2 per week (where x is the number of weeks) in allowance, for a total of y dollars.
Valerie has $2 and then earns $1 per week (where x is the number of weeks) in allowance, for a total of y dollars.
Valerie eams $1 per week (where x is the number of weeks) in allowance and has spent $2, for a total of y dollars.
Valerie earns $2 per week (where x Is the number of weeks) in allowance and has spent $1, for a total of dollars.
(pls help quickly)

Julius went on a volunteer trip to centralamerica and took medical supplies with him.he packed a bag with 50 pounds of supplies.he brought pieces of equipment that weighed10 pounds each and bottles of medicine thatweighed pound each prepresents thenumber of pieces of equipment he broughtand b represents the number of bottles ofmedicine he brought then the total weight canbe represented by the equation 10p+b 50.the brought 3 pieces of equipment, how manybottles of medicine did he bring?