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RE: Be the First to Solve this Math Test and Win an 100% upvote worth $0.4 Instantly #15
7a * 6 = 210
7a = 210/6
7a = 35
a = 35/7
a = 5 = 1 worker can make 5 pairs of cup per day.
b5 * 10 = 450
5b = 450/10
5b = 45
b = 9
9 workers needed to make 450 pairs of cup in 10 days.
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