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Mathematics, 13.10.2019 02:20 trevorhenyan51

Acommuter has $245 in his commuter savings account. this account changes by -$15 each week he buys a ticket.

a- if the account changes by -$240, for how many weeks of tickets did the commuter buy?

b- if the commuter wants to buy 20 weeks of tickets, how much must he add to his accoumt?

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