First you must distribute the 2 into (2t+4)
2(2t+4) ~ 4t+8
Do the same with the right side
3/4(24-8t) ~ 18-6t
This is what you should have thus far
4t+8=18-6t
You now need to get all of your "t"s on one side. You can do this by either adding 6t to both sides OR subtracting 4t from both sides.
8=18-10t OR 10t+8=18
Again you want to get t by itself
-10=-10t OR 10t=10
Then
1=t OR t=1
Therefore, your answer will be t=1
You can check your answer by plugging in "1" for all "t"s in the equation!