Find the value of k, if x = 1, y = 2 is a solution of the equation 3x + 2y = k.

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Solution

The correct option is C 7
Putting x = 1 and y = 2 in the given equation,
(3 x 1) + (2 x 2) = k
3 + 4 = k
$\Rightarrow$ k = 7

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