10. 2t + 21 = 3 (t+5)

Answer: T=6

Step-by-step explanation:

2t+21=3 (t+5) Distribute the 3 to the T and the 5 You will then end up with 2t + 21 = 3t + 15 You want to get rid of the 2t so you subtract 2t from both sides and you also want to get rid of 15 so also subtract 15 from both sides you will then end up with 6 = T