Answer:
30mph faster
Step-by-step explanation:
first you must find how fast the train can go in 1 hour
that is 60mph, then multiply 60 and 2.5
60x2.5 = 150mph then,
150 - 120 =30mph
very sorry if this is wrong
This is known as "5 take 3", where ordering is not important.

Answer:
No Solution
Step-by-step explanation:
It does not make sense to have two different variables on the same equation.
Answer:
The answer is -(x-3)
Step-by-step explanation:
It can be written as a negative number so it can be divided/cut :
3 - x = -x + 3
= -(x+3)