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Mutua has 21 coins. The total value of the coins is Kshs. 72. There are half as many ten shillings coin as there are five shilling coins. If the rest are one shilling coin, find the number of five shilling coins mutual has.

      

Mutua has 21 coins. The total value of the coins is Kshs. 72. There are half as many ten shillings coin as there are five shilling coins. If the rest are one shilling coin, find the number of five shilling coins mutual has.

  

Answers


Joy
Total coins=21
Total value=kshs 72
So let ;
Ksh 10 be x
Ksh 5 be 2x
Ksh 1 be y
since they say say there half as many kshs 10 coins as ksh 5
Then we say
2x+x+y=21
5(2x)+10(x)+1(y)=ksh 72
So the simultaneous equation will be
3x+y=21
20x+y=72
Solving as a simultaneous equation gives;
x=3
y=12
So the number of ksh 5 coins he has is 6
=6


kapoor answered the question on February 20, 2019 at 19:07


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