c=100,000/n+5
c-5=100,000/n+5-5
c-5=100,000/n
n(c-5)=100,000n/n
n(c-5)=100,000
n(c-5)/(c-5)=100,000/(c-5)
n=100,000/(c-5)
Now we can calculate the number of units that were produced given the production cost of a product. For example: if the production cost of a product is 10 dollars, what is the number of products that the plant produced?
n=100,000/(c-5)
n=100,000/(10-5)
n=100,000/5=20,000
Checking the answer:
c=100,000/n+5
c=100,000/(100,000/(c-5))+5
c=100,000*((c-5)/100,000)+5
c=c-5+5
c=c