[tex]\qquad\qquad\huge\underline{{\sf Answer}}[/tex]
let's evaluate ~
[tex]\qquad \sf \dashrightarrow \: - 6 - 5(6x - 4)[/tex]
[tex]\qquad \sf \dashrightarrow \: - 6 - [(5 \cdot6x) - (5 \cdot4)][/tex]
[tex]\qquad \sf \dashrightarrow \: - 6 - (30x - 20)[/tex]
[tex]\qquad \sf \dashrightarrow \: - 6 -30x + 20[/tex]
[tex]\qquad \sf \dashrightarrow \: - 30x + 14[/tex]
I hope you understood the whole procedure ~