AMC12 2014 B
AMC12 2014 B · Q1
AMC12 2014 B · Q1. It mainly tests Linear equations, Money / coins.
Leah has 13 coins, all of which are pennies and nickels. If she had one more nickel than she has now, then she would have the same number of pennies and nickels. In cents, how much are Leah’s coins worth?
Leah 有 13 枚硬币，全都是便士和镍币。如果她再多一枚镍币，那么她就会有相同数量的便士和镍币。Leah 的硬币总价值多少美分？
(A)
33
33
(B)
35
35
(C)
37
37
(D)
39
39
(E)
41
41
Answer
Correct choice: (C)
正确答案：（C）
Solution
Leah has 7 pennies and 6 nickels, which are worth $7 \cdot 1 + 6 \cdot 5 = 37$ cents.
Leah 有 7 枚便士和 6 枚镍币，价值 $7 \cdot 1 + 6 \cdot 5 = 37$ 美分。
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