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Q.

Among the following which is not a solution of 2x+y=4 is

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a

(0,4)

b

(1,2)

c

(2,0)

d

(2,−1)

answer is D.

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Detailed Solution

2x+y=4⇒(0,4)⇒2(0)+4=4⇒4=4

(1,2)⇒2(1)+2=4⇒4=4

(2,0)⇒2(2)+0=4⇒4=4

(2,−1)⇒2(2)−1=4⇒3≠4

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