Isaiah wants to save up to buy a $325 electronic tablet. he makes $14 per day mowing lawns in his neighborhood. he has $31 already saved. isaiah wrote an equation to determine how many days he needs to mow lawns before he can afford the tablet. his equation is t=px+r where t is the cost of the tablet and x is the number of days he needs to mow lawns. what is the value of p in his equation? p=