455 / x +546 / x - 1 /x =125 (nhân x vào)
455x / x + 546x / x - x / x =125x
455 + 546 -1 = 125x
125x = 1000
x = 8
\(\frac{455}{x}+\frac{546}{x}-\frac{1}{x}=125\)
\(\Leftrightarrow\frac{455+546-1}{x}=125\)
\(\Leftrightarrow\frac{1000}{x}=125\)
\(\Leftrightarrow x=\frac{1000}{125}\)
\(\Leftrightarrow x=8\)
Vậy x = 8