Answer :
The expression is given as,
[tex]6\text{ }\times\text{ ( b - 0.13b )}[/tex]According to the distributive property,
[tex]a\text{ ( b - c ) = a}\times b\text{ - a}\times c[/tex]The given expression is simplified as follows :
[tex]\begin{gathered} 6\text{ }\times\text{ ( b - 0.13b ) = 6}\times b\text{ - 6 }\times\text{ 0.13b} \\ 6\text{ }\times\text{ ( b - 0.13b ) = 6b - 0.78b} \\ 6\text{ }\times\text{ ( b - 0.13b ) }=\text{ b ( 6 - 0.78 )} \\ 6\text{ }\times\text{ ( b - 0.13b ) = 5.22b} \end{gathered}[/tex]Thus the result of the given expression is ,
[tex]6(b-0.13b)\text{ = 5.22b}[/tex]