Asked by Nobble
You have twice as many 20 cent coins as 10 cents coins and half the number of 5 cent coins as 10 cent coins. If you have R4,20 altogether, find out how many of each coin denomination do you have?
Answers
Answered by
oobleck
suppose you have x,y,z of 5¢, 10¢, 20¢ coins, respectively. Then you know that
z = 2y
y = 2x
5x+10y+20z = 420
Now just solve as usual
z = 2y
y = 2x
5x+10y+20z = 420
Now just solve as usual
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