1/9x + 25=1/4x 怎么解
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1/9x + 25=1/4x 怎么解
1/9x + 25=1/4x 怎么解
1/9x + 25=1/4x 怎么解
1/9x + 25 = 1/4x
=> 4/36x + 25 = 9/36x
=> 25 = 5/36x
=> x = 180
先解1/X
1/X=25/(1/4-1/9)=25/(5/36)=180
x=1/180
移项:
25=1/4x -1/9x=1/x(1/4-1/9)=(1/x)*(5/36)
所以:1/x=25*(36/5)=5*36=180
x=1/180
1/9x + 25 = 1/4x
4/36x + 25 = 9/36x
25 = 5/36x
x = 180