#linear equation in 2 variable ig?

37 messages · Page 1 of 1 (latest)

formal zenith
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Q.
If the person has a denomination of ₹ 100 and ₹ 200 notes with him and has a total of 12 notes with him
then what combination of each denomination together can he be able to make the payment?
payment = 1300

sturdy fiberBOT
#
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livid ermine
formal zenith
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x + y = 12 , so like x = 12 - y , y = 12 - x

livid ermine
formal zenith
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huh... i don't quite get it

livid ermine
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Well, the total sum needs to be 1300, right?

formal zenith
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x + y = 1300

livid ermine
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No.

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x + y = 12.

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For the second equation you need to consider how much each amount of notes is worth, not just how many of them there are.

formal zenith
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100x + 200x = 1300 or smth like that

livid ermine
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Yeah, nice!

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Oh, though, 200y, rather.

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So, you have a system:
x + y = 12
100x + 200y = 1300

formal zenith
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okie so i equate both of them

livid ermine
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What do you mean?

formal zenith
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ntg 😭

formal zenith
livid ermine
formal zenith
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100 ( 12 - y ) + 200y = 1300

livid ermine
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Right. So, now express y from here.

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Probably best to start by dividing everything by 100.

formal zenith
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did i do smth wrong? i got y = 1/3

livid ermine
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Well, I don't know unless you show what you did.

formal zenith
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1200 - 100y + 200y + 1300 , 1200 - 300y = 1300 , 300y = 1300- 1200 , y = 100/300 , y = 1/3

livid ermine
formal zenith
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oh yeaa that sorry missed the sign

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so y would be 1

livid ermine
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Yes. And x?

formal zenith
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x = 12 - y , x = 11

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thxxxxxx!!

livid ermine
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Nice, you're welcome!

formal zenith
#

+close

versed lavaBOT
# formal zenith +close
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versed lavaBOT
# versed lava

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