Question

if 7a=3 and 3b=7, what is the value a/b

Answer 1

9/49

Answer 2

7a=3
means a=3/7
3b=7
means
b=7/3
\[\frac{ a }{ b }=\frac{ \frac{ 3 }{ 7 } }{ \frac{ 7 }{ 3 } }=\frac{ 3 }{ 7 }*\frac{ 3 }{ 7}\]

Answer 3

a/b=9/49