Question

National brand of cough medicine costs $12, what is the cost of the store brand? S=2/3N

Answer 1

Okie, so more information might be needed. What is S and what is N. I will assume that the price of the store brand is 2/3(national brand). In this case, you plug in the the national brand price.
2(12)/3 = 24/3 = $8
I hope this helps :-)