02/28/14

John bought a number of notepads for $70. Four of the notepads got spoiled. He sold the remaining notepads at $3 more a per pad, and made a total profit of $10.
How many notepads did John buy?  I know the answer is 14 but could you help me understand how to write it correctly thank you.
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02/28/14

Two ration numbers have a sum of 17/12.
17/12 The second number is formed by reducing both the numerator and denominator of the first number by one. If the denominator of the first number is one more than its  numerator, find the two... more
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