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ZX-87B6F6DA08Bluebook试题4 · 第 5 题
Bluebook试题4 · 原库模块 1 · Q5 原库参考解析
4x = 20
-3x + Y = -7
The solution to the given system of equations is (x, y). What is the value of x + y?
参考答案：
解题思路
容易忽略的一步
-3x + Y = -7
The solution to the given system of equations is (x, y). What is the value of x + y?
