Initial payment = $50
installment = $ 30 monthly
Step 1: Obtain how much will be paid in installment
Let the number of months be m
Amount paid in x months will be
=> 30m
Step 2: Obtain the Total amount
Let the total amount be represented by t
Total amount = initial amount + amount paid in installment
Total amount = 30m + 50
t = 30m + 50