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AMC10 2003 B

AMC10 2003 B · Q2

AMC10 2003 B · Q2. It mainly tests Linear equations, Fractions.

Al gets the disease algebritis and must take one green pill and one pink pill each day for two weeks. A green pill costs $1 more than a pink pill, and Al’s pills cost a total of $546 for the two weeks. How much does one green pill cost?
Al 得了代数炎,必须每天服用一颗绿色药丸和一颗粉色药丸,持续两周。绿色药丸的价格比粉色药丸贵 1 美元,Al 的药丸两周总共花费 546 美元。一颗绿色药丸多少钱?
(A) $7 7 美元
(B) $14 14 美元
(C) $19 19 美元
(D) $20 20 美元
(E) $39 39 美元
Answer
Correct choice: (D)
正确答案:(D)
Solution
The cost of each day’s pills is $546/14 = 39$ dollars. If $x$ denotes the cost of one green pill, then $x + (x -1) = 39$, so $x = 20$.
每天药丸的花费是 $546/14 = 39$ 美元。如果 $x$ 表示一颗绿色药丸的花费,则 $x + (x -1) = 39$,所以 $x = 20$。
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