Answer: 
This is the same as 
All we're doing is adding 'a' and
since the term "sum" is the result of adding two or more numbers.
One quarter of a number is the same as dividing by 4.
Example: one quarter of 28 = 
Consider the given equation:

Cross multiplying in the given equation, we get

Applying distributive property which states
, we get


Adding '4' on both the sides, we get


Subtracting '10n' from both the sides of the equation, we get


Dividing by '-8' in both the sides of the equation, we get

Therefore, the value of 'n' is -1.
A i’m gonna say the answer is alA but if they both have tick marks on the side it means they are the same. but can i see the picture first
1/10 = 0.1
2,871,000 ×0.1 = 287,100
Your answer is 287,100
HOPE THIS HELPED :)