larissa's sister makes weekly installment payments for a motorized scooter she purchased from a friend. She purchased the motorized scooter for $600 and is paying $18.75 a week to her friend until it is paid off. Clarissa's sister wants to know when she has $150 left to pay for the motorized scooter. Select the equation and solution for the number of months, x, it takes her to have $150 left to pay.