设原来语文老师13x人,数学老师7x人
(13x-2):(7x+2)=3:2
2(13x-2)=3(7x+2)
26x-4=21x+6
26x-21x=6+4
5x=10
x=2
13x=13×2=26
7x=7×2=14
答:原来语文老师26人,数学老师14人
语文教师与数学教师比是13:7,语文教师2人改行教数学,则人数的是3:2,数学教师各有多少人?
语文教师与数学教师比是13:7,语文教师2人改行教数学,则人数的是3:2,数学教师各有多少人?
用方程解
用方程解
数学人气:400 ℃时间:2019-11-15 07:26:49
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