Multiply numerator and denominator by

Things should simplify pretty nicely.
Answer: 5 word per 25 sec
Step-by-step explanation:
1 word per 5 sec + 2 word per 10 sec +2 word +10 sec
N would be the variable that we are solving for.
Lets solve:-
n * 3.25 = 325
3.25/3.25 = 325/3.25
n = 100
Answer: n = 100