ONE QUESTION, ONE STEP
ZX-E38602C0742025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
参考答案:
解题思路
容易忽略的一步
