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歡迎您訪問數學考題練習:當k=________時,方程組中x與y互為相!

數學考題練習:當k=________時,方程組中x與y互為相

更新時間:2024-01-12 14:00:53作者:貝語網校

當k=________時,方程組中x與y互為相反數.

試題答案

8

試題解析

先用含k的代數式表示x,y,即解關于x,y的方程組,再代入x+y=0即可.

解答:根據題意得,

解得k=8,

故本題答案為:8.

點評:本題的實質是解三元一次方程組,解答此題還要熟悉相反數的概念.

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