The principal amount is 
<u>SOLUTION:
</u>
Given that, simple interest
;
after 3 years
We have to find the principal.
Now, let the principal amount be p.
Then,
Now, we know that, Balance = Principal amount + Simple Interest

Answer:
option A
x=15/2
Step-by-step explanation:
refer to the above attachment
sorry for the messy writing:^
Answer: C)
Step-by-step explanation:

is the quotient of m and 7.