If 2x-3y=7 and (a+b)x-(a+b-3)y=4a+b repr...

If `2x-3y=7` and `(a+b)x-(a+b-3)y=4a+b` represent coincident lines, then `a` and `b` satisfy the equation (a)`a+5b=0` (b) `5a+b=0` (c) `a-5b=0` (d) `5a-b=0`

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