Question

HANNAH borrows $30 from her parents. each week, she pays them back the same amount. the total amounts she owes her parents after weeks 0,1,2,3, & 4 are $30,$25,$20,$15, & $10respectively. what's the equation for this?

Answer 1

30-5d ( where d stands for amount of days, and 5 is the amount of moeay paid per day)