Ta có:
\(9\frac{2}{7}=\frac{7\times9+2}{7}=\frac{65}{7}\)
Mà \(9\frac{2}{7}=\frac{B}{7}\) nên \(\frac{65}{7}=\frac{B}{7}\)
Vậy \(B=65\)
\(9\frac{2}{7}=\frac{9\times7+2}{7}=\frac{65}{7}\)
vậy B = 65
Vì
\(9\frac{2}{7}=\frac{9\times7+2}{7}\frac{65}{7}\)
nên \(9\frac{2}{7}=\frac{B}{7}\) => \(\frac{65}{7}=\frac{B}{7}\)
Vậy B=65
^...^ mk nha bạn !!!