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歡迎您訪問每日一練:初三(1)班在今年的植樹節領有平均每人植樹6棵的任!

每日一練:初三(1)班在今年的植樹節領有平均每人植樹6棵的任

更新時間:2024-01-12 12:49:44作者:貝語網校

初三(1)班在今年的植樹節領有平均每人植樹6棵的任務,如果只由女同學完成,每人應植樹15棵,如果只由男同學完成,每人應植樹的棵數為

A.9

B.10

C.12

D.14

試題答案

B

試題解析

要求單獨由男生完成,每人應植樹多少棵,就要先設出未知數,根據題中的等量關系,列方程求解.

解答:設單獨由男生完成,每人應植樹x棵.那么根據題意可得出方程:

解得:x=10.

檢驗得x=10是方程的解.

因此單獨由男生完成,每人應植樹10棵.

故選B.

點評:考查了分式方程的應用,本題為工作效率問題,可根據題意列出方程,判斷所求的解是否符合題意,舍去不合題意的解.

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