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歡迎您訪問數(shù)學(xué)考題練習(xí):已知方程組的解為,則4a-3b的值為_____!

數(shù)學(xué)考題練習(xí):已知方程組的解為,則4a-3b的值為_____

更新時間:2024-01-12 16:25:35作者:貝語網(wǎng)校

已知方程組的解為,則4a-3b的值為________.

試題答案

9

試題解析

把代入方程組即可得到一個關(guān)于a,b的方程組求得a,b的值,代入代數(shù)式即可求解.

解答:根據(jù)題意得:,

解得:,

則4a-3b=6+3=9.

故答案是:9.

點(diǎn)評:本題考查了方程組的解得定義,以及方程組的解法,理解方程組的解的定義是關(guān)鍵.

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