We use letters to substitute for unknown numbers. I hope this helps. :)
Answer:
3/2 or 1.5
Step-by-step explanation:
Answer:
It is proved that
.
Step-by-step explanation:
We already have the identity of x as
.......... (1) .
So, from equation (1) we can write that

⇒ 
⇒ 
⇒
Hence, it is proved that
. (Answer)
Answer/Step-by-step explanation:
Recall: 
a. 
b. 
c. 