Answer :
x - the number
[tex]\frac{1}{7}(x-16)=\frac{1}{9}x \ \ \ \ \ |\times 63 \\ 9(x-16)=7x \\ 9x-144=7x \ \ \ \ \ \ \ |-9x \\ -144=-2x \ \ \ \ \ \ \ \ \ |\div (-2) \\ x=72[/tex]
The number is 72.
[tex]\frac{1}{7}(x-16)=\frac{1}{9}x \ \ \ \ \ |\times 63 \\ 9(x-16)=7x \\ 9x-144=7x \ \ \ \ \ \ \ |-9x \\ -144=-2x \ \ \ \ \ \ \ \ \ |\div (-2) \\ x=72[/tex]
The number is 72.