Question

Describe how you solved the following problem:

I have a jar filled with $100 worth of quarters, nickels, and dimes. 

I have the same amount of each type of coin. How many total coins do I have in my jar? 

Answer 1

first you make sure you have all your variables using same measurement - cents (since it is the smallest)

$100 = 100*100 cents = 100,000 cents
1 quarter = 25 cents
1 nickel = 5 cent
1 dime = 10 cents

the test of your problem said that:
you have $100 in i don't know how many coins of quarters, nickels and dimes
100,000 = X * (25+5+10)


we have to find X:

100,000= X *(25+5+10)
100,000= X *40
X= 100,000/40
X = 2,500 coins