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The formula a = m − n represents the actual cost, a, of an item with original price m after a coupon for n dollars off is applied. Solve the formula for the amount of the coupon. Group of answer choices n=a+m n=m−a n = a − m n = −m − a

User Gaumann
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1 Answer

5 votes

Answer: Option B.

Explanation:

The given formula is


a=m-n

where,

a = actual cost of an item.

m = Original price

n = Amount of coupon

We need to solve the formula for the amount of the coupon (n).

In means, we need to isolate n in the given formula.

We have,


a=m-n

Subtract m form both sides.


a-m=m-n-m


a-m=-n

Multiply both sides by -1.


-(a-m)=n


-(a)-(-m)=n


-a+m=n

So,
n=m-a.

Therefore, the correct option is B.

User Techie
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