Question

A commuter has $245 in his computer savings account.This account changes by $-15 each week he buys a ticket.In one period,the account changes by $-240. For how many weeks did the commuter buy tickets? How much must he add to this account if he wants to have 20 weeks worth of tickets in his account

Answer 1

He needs $395, cuz he already had $5, and 15×20=300. subtract the 5 from 300.