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单选题
If 2x+y =y+14, then x = ______.
A
7/2
B
7
C
14
D
21
E
It cannot be determined.
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参考解析
解析:
If 2x+y = y+14, subtracting y from each side of the equation gives 2x = 14, so x =14/2 = 7.
If 2x+y = y+14, subtracting y from each side of the equation gives 2x = 14, so x =14/2 = 7.
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