Answer:
n = m-a
Step-by-step explanation:
The formula is : ...(1)
a is actual cost of an item
m is original price
n is amount of coupon
We need to solve the formula for the amount of coupen.
Subtracting m to the both sides of equation (1).
a-m = m-n-m
-n=a-m
or
So, the formula for the amount of coupon is n = m-a.
x= 60
10%
The picture below will be at help, hopefully! ^^'
115.44
