Question 811707: How many nickels are in d dollars?
n*5=100d
100d/5=20
Found 2 solutions by MathLover1, KMST:
Answer by MathLover1(20850)   (Show Source):
Answer by KMST(5328)  (Show Source):
You can put this solution on YOUR website!  = number of nickels in  dollars
 = value of nickels, in cents
 = value of dollars, in cents
So the equation is 
because the value is the same.
Or you could write it as  , or  .
Anyway, dividing both sides of the equal sign by 5,
you get equal amounts on both sides again, and you have
 which simplifies to 
That last equation allows you to calculate the amount of nickels in dollars, and that is the answer to your problem.
No matter what is, you just multiply that number of dollars times 20 and you get how many nickels that is.
You do not need to know algebra to figure that out, because you know that there are 20 nickels in a dollar.
The beauty of algebra is that if you know how to write a formula like that,
anyone who can read algebra can make the calculations for you for many different values.
If you can read algebra, you can work for an engineer calculating his (or her) formulas all day. It can pay nicely.
If you are the engineer, you write the formulas, and have other people (or a computer) do all the calculations for you, and the engineer gets paid even better.
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