阅览室有36名同学在看书,其中4/9是女生,后来又转来几名女生,使得女生人数达到总人数的9/19,问又转来几名女生?
阅览室有36名同学在看书,其中4/9是女生,后来又转来几名女生,使得女生人数达到总人数的9/19,问又转来几名女生?
数学人气:297 ℃时间:2019-10-17 07:24:21
优质解答
36*4/9=16,设转来x名学生,则有(36+x)*9/19=16+x,解方程得x=2
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