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2025年9月国际A卷 · 第 21 题

2025年9月国际A卷 · 原库模块 2 · Q21 知序中文精讲

5x+3y=6
The given equation is one equation in a system of two linear equations. If the system of equations has at least one solution, which of the following equations could be the other equation in the system?
I.     7.5x+4.5y=9
II.    7.5x-4.5y=9

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