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Joe works a part-time job at grocery store which pays $45 a week. He has already saved $75 towards the purchase of a new $480 iPhone. How many weeks must he work in order to have enough money to buy the iPhone?

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gufeliz1965

He makes $45 per week.

He has $75.

Price of the phone minus what he has = $405.

Let w = the number of weeks he must work to buy the phone.

w = $405/$45

w = 9

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