Find the value of k for which the lines ( k + 1 )x + 3ky +15 = 0 and 5x + ky + 5 = 0 are coincident

Find the value of k for which the lines ( k + 1 )x + 3ky +15 = 0 and 5

1.	Find the value of k for which the lines ( k + 1 )x + 3ky +15 = 0 and 5x + ky + 5 = 0 are coincident
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