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歡迎您訪問數(shù)學(xué)考題練習(xí):學(xué)校文藝部組織部分文藝積極分子看演出,共購得8!

數(shù)學(xué)考題練習(xí):學(xué)校文藝部組織部分文藝積極分子看演出,共購得8

更新時(shí)間:2024-01-12 14:01:57作者:貝語網(wǎng)校

學(xué)校文藝部組織部分文藝積極分子看演出,共購得8張甲票,4張乙票,總計(jì)用了112元.已知每張甲票比乙票貴2元,則甲票、乙票的票價(jià)分別是

A.甲票10元∕張,乙票8元∕張

B.甲票8元∕張,乙票10元∕張

C.甲票12元∕張,乙票10元∕張

D.甲票10元∕張,乙票12元∕張

試題答案

A

試題解析

用二元一次方程組解決問題的關(guān)鍵是找到2個(gè)合適的等量關(guān)系.

本題中2個(gè)等量關(guān)系為:購買甲票錢數(shù)+購買乙票錢數(shù)=112元,甲票單價(jià)-乙票單價(jià)=2元.

解答:設(shè)甲票、乙票的單價(jià)分別是x元,y元,

則,解得.

故甲票10元∕張,乙票8元∕張.

故選A.

點(diǎn)評:解題關(guān)鍵是要讀懂題目的意思,根據(jù)題目給出的條件,找出合適的等量關(guān)系,列出方程組,再求解.利用二元一次方程組求解的應(yīng)用題一般情況下題中要給出2個(gè)等量關(guān)系,準(zhǔn)確的找到等量關(guān)系并用方程組表示出來是解題的關(guān)鍵.

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