a) `=3/2 xx((3+4)/7)=3/2 xx1=3/2`
b) `=17/5 xx11/7 +12/35=(187+12)/35=199/35`
a \(\dfrac{3}{2}\left(\dfrac{4}{7}+\dfrac{3}{7}\right)=\dfrac{3}{2}\times\dfrac{7}{7}=\dfrac{3}{2}\times1=\dfrac{3}{2}\)
b \(\dfrac{17}{5}\times\dfrac{11}{7}+\dfrac{12}{35}=\dfrac{187}{35}+\dfrac{12}{35}=\dfrac{199}{35}\)