• 试题 ID 5145


(1) 计算: $(-3)^2 \times 3^{-1}+(-5+2)+|-2|$;
(2) 解方程组: $\left\{\begin{array}{l}2 x-y=3,(1) \\ x+y=6 . \text { (2) }\end{array}\right.$.
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解析:

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