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Question

The point (1,2) lies on the line _____.


A

x + 2y = 5

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B

2x + y = 5

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C

4x – y = 5

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D

3x – 2y = 1

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Solution

The correct option is A

x + 2y = 5


A point lies on a line if its coordinates satisfy the equation of the line.

Substituting (1,2) in the equation,

1) x+2y=51+2(2)=5, satisfies the equation

2) 2x+y=52(1)+2=45, does not satisfy the equation

3) 4xy=54(1)2=25, does not satisfy the equation

4) 3x2y=13(1)2(2)=11, does not satisfy the equation

(1,2) lies on the line x+2y=5


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