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2025年12月国际B卷 · 第 21 题

2025年12月国际B卷 · 原库模块 2 · Q21 原库参考解析

\( 39(x-n)=39y+39n \) 
One of the equations in a system of two linear equations is given, where n is a positive constant. The system has no solution. Which equation could be the second equation in this system?
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