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Question

find the value of k so that the lines -x + y + 3 and kx + 2y = 8 will be parallel.

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Solution

The given equations are:- x +y=-3 ...........ikx + 2y = 8 ............iiFor the given lines to be parallela1a2=b1b2c1c2-1k=12-38Therefore, from the equation-1k=12 , we getk=-2Hence, the required value of k is -2.

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