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Ilya [14]
2 years ago
14

O 3x=4-y

Mathematics
1 answer:
Setler [38]2 years ago
3 0
It’s a because when you flip it will be A
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Answer:

Notebook is $4

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Step-by-step explanation:

Let notebooks be x and thumb drives be y

6x+7y=$185

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These two are simultaneous equation. Multiplying the first equation by 7 and second by 3 we obtain

42x+49y=$1295

42x+36y=$996

Subtracting the third equation from the fourth

996-1295=-$299

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y=$299/13=$23

To get the value of x, we substitute the value of y into the first equation

6x+(7*23)=$185

6x=$185-$161

6x=$24

x=$4

Therefore, price of notebook is $4, price of thumb drive is $23

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3 years ago
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