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Shelly's book collection has B books. Every week she reads and gets rid of 15 books. Every 2 weeks, she goes to a book sale and buys 36 books. What is the expression for her book collection count?
If Steven can mix 20 drinks in 5 minutes, Sue can mix 20 drinks in 10 minutes, and Jack can mix 20 drinks in 15 minutes. How much time will it take all 3 of them working together to mix the 20 drinks?
Three times the sum of two numbers exceeds twice their difference by five, while half the sum is two more than the difference. What are the two numbers?
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