a)
\(792:y=11\)
\(y=792:11\)
\(y=72\)
b)
\(y=\dfrac{7}{11}-\dfrac{4}{13}\)
\(y=\dfrac{47}{143}\)
a, ( 821 - 29) : y=11
792 : y=11
y= 792 : 11
y= 72
b, \(y+\dfrac{4}{13}=\dfrac{7}{11}\)
\(y\) \(=\dfrac{7}{11}-\dfrac{4}{13}\)
\(y\) \(=\dfrac{47}{143}\)
a)\(y=\dfrac{792}{11}=72\)
b)\(y=\dfrac{7}{11}-\dfrac{4}{13}=\dfrac{91}{143}-\dfrac{44}{143}=\dfrac{47}{143}\)