Step-by-step explanation:
Put value of b as given and using BODMAS rule,
[tex]6(2b - 4)[/tex]
[tex] = > 6((2 \times 5)-4)[/tex]
[tex] = > 6(10 - 4)[/tex]
[tex] = > 6 \times 6[/tex]
[tex] = > 36[/tex]
Henve, value of of the given expression is [tex]36[/tex]
[tex]\\ \rm\rightarrowtail 6(2b-4)[/tex]
[tex]\\ \rm\rightarrowtail 12b-24[/tex]
[tex]\\ \rm\rightarrowtail 12(5)-24[/tex]
[tex]\\ \rm\rightarrowtail 60-24[/tex]
[tex]\\ \rm\rightarrowtail 36[/tex]