Hey there!
-3{2(3t + 1) - (8 + 4t)}
= -3(2(3t + 1) - 8 - 4t
= -3(2 + (3t + 1) - 3(-8) - 3(-4)
= -18t - 6 + 24 +12t
COMBINE the LIKE TERMS
= -16t + 18
Therefore, your answer is: -16t + 18
Good luck on your assignment and enjoy your day!
~Amphitrite1040:)