Combine like terms: 3t + 5 (3 + t) - 2t - 4
We have 3t + 5(3 + t) - 2t - 4 expand the bracketed term.
3t + 15 + 5t - 2t - 4 now group the t-terms together and all the constant terms together.
3t + 5t - 2t + 15 - 4 now add togwtgher te t-terms and the constant terms.
8t - 2t + 11 =
6t - 11