For what value of k, $x = 2 a n d y = - 1$ is a solution of $x + y - k = 0$ :

1

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- 2

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Solution

The correct option is D $1$
if $x = 2$ and $y = - 1$ is a solution of $x + y - k = 0$
then , $2 + (- 1) - k = 0$
$k = (1)$ .

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