Respuesta :

ayah1
5t + (t - 3) - [(7t + 5) - (8 - 3t)]    (multiply -1 to (8 - 3t)

5t + (t - 3) - [(7t + 5) - 8 + 3t]

5t + (t - 3) - [7t + 3t + 5 - 8]

5t + (t - 3) - [10t - 3]        (multiply -1 to [10t - 3]

5t + (t - 3) - 10t + 3

5t + t - 10t - 3 + 3

-4t
answer