Question

Question in comments

Answer 1

Let them equal and solve for t and s, then plug back to get the answer.

Answer 2

meaning Q(t)=P(s), or
(6t+6, 3t+7, 3t+8)=(2s+4, 5s+2, 5s+3)
so that you can equate each component separately
6t+6=2s+4,
...
and solve for s and t.

Answer 3

Notice that P(0)= Q(1)=(6,7,8)
That is easier, I think

Answer 4

@eliesaab
Exactly,... when you're given choices, or if both arguments are small whole numbers.