SAT数学Problem Solving练习题(44)

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摘要:下面是小站SAT频道为大家整理了SAT数学Problem Solving练习题(44),供考生们参考,以下是详细内容。

以下是小站SAT频道为大家整理了SAT数学Problem Solving练习题(44),供考生们参考,以下是详细内容。

Question 44: If x + 4y = 6 and x - 2y = 3, which of the following statements is not true?

(a) y = 1/2

(b) x = 4

(c) y = 2

(d) xy = 2

(e) x + y = 9/2

Answer: In order to find the values of x and y, we multiply the second equation by 2 and add the 2 equations:

x + 4y = 6

2x - 4y = 3

3x = 12 and x = 4, y = (6 - 3)/4 = 1/2.

y = 2 is the only equality that is false.

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