Gọi số cần tìm là x
Ta có: \(\dfrac{1}{4}x+75=x:\dfrac{1}{4}-75\)
\(\Rightarrow\dfrac{1}{4}x+75=4x-75\)
\(\Rightarrow\dfrac{1}{4}x+150=4x\)
\(\Rightarrow\dfrac{15}{4}x=150\Rightarrow x=40\)
Ta có: `x xx 1/4 + 75 = x : 1/4 - 75`.
`=> x/4 + 75 = 4x - 75`
`=> 150 = 4x - x/4`
`=> 150 = (15x)/4`.
`=> x = 40.`