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Tomorrow is my exam and I came across this question in my practice paper again. I hate this type of questions a lot. Can you help? The second question is:

Mrs Kumar paid $14 438 for 5 similar laptops and 4 similar DVD players. If 1 laptop and 1 DVD player cost $2960 altogether, what was the cost of each DVD player?

 May 11, 2017
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Mrs Kumar paid $14 438 for 5 similar laptops and 4 similar DVD players.

If 1 laptop and 1 DVD player cost $2960 altogether,

what was the cost of each DVD player?

 

Let x = laptop
Let y = DVD player

 

(1)x+y=$2960|yx=2960y(2)5x+4y=$14438|x=2960y5(2960y)+4y=14438529605y+4y=14438148005y+4y=1443814800y=14438|(1)14800+y=14438|+14800y=1480014438y=$362x=2960y|y=362x=2960362x=$2598

 

Each DVD player cost $362

 

laugh

 May 11, 2017
edited by heureka  May 11, 2017
edited by heureka  May 11, 2017

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