john works for 12 weeks for 7.50 an hour, he spends 20 a week on lunch. how many hours will he have to work to buy a 210 class ring?
Considering that he's working 5 days a week, and he needs to work x hours per day.
12 * x * 5 * 7.5 - 20 * 12 = 210
450 x - 240 = 210
450 x = 450
x = 1;
He needs to work 1 hour per day for 12 weeks.
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