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Wayne has 20 pieces of notes. The type of denominations are $2, $5 and $10.  The number of $2notes and $10 notes is the same. The total value of these notes is $110. How many pieces of denomination does he have?

 Apr 10, 2020
 #1
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Let the  number  of  $2  and $10  notes  =  x

 

Then the  number of $5  notes  =  20 - 2x

 

So   we have  this equation

 

2x  + 5 (20 - 2x)  + 10x  =  110     simplify

 

2x  + 100 - 10x + 10x  =  110

 

2x  + 100  =  110     subtract  100 from both sides

 

2x =  10     divide both sides by 2

 

x = 5

And 

20 - 2(5)  =  10

 

He  has  5  $2  notes

He has 10  $5 notes

He has 5  $10 notes

 

cool  cool cool

 Apr 10, 2020

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