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Q.

The cost of a notebook is twice the cost of a pen. If the cost of a notebook is x and that of a pen is y, then a linear equation in two variables to represent the given condition is


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a

x+2y=0

b

x-2y=0

c

2x+y=0

d

2x-y=0  

answer is B.

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Detailed Solution

Given, the cost of notebook =x and the cost of pen =y.
Also, the cost of a notebook is twice as much as that of a pen.
According to the given condition,
x=2y ⇒x-2y=0 Hence, the correct option is 2.
 
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