`{:(2x - 4y = 3),(5x - ky = 7.5):}`

{:(2x - 4y = k),(5x - 10y = 7.5):}

{:(x - ky = 2),(3x + 2y =-5):}

If (3x -4y) : (2x -3y) = (5x -6y) : (4x -5y) , find : x : y .

Solve : (7 + x)/(5) - (2x - y)/(4) = 3y - 5 (5y - 7)/(2) + (4x - 3)/(6) = 18 - 5x

If the lines 2x + y - 3 = 0 , 5x + ky - 3 = 0 " and " 3x - y - 2 = 0 are concurrent , find the value of k.

If the lines 2x + y - 3 = 0 , 5x + ky - 3 = 0 " and " 3x - y - 2 = 0 are concurrent , find the value of k.

If the lines 2x + y - 3 = 0 , 5x + ky - 3 = 0 " and " 3x - y - 2 = 0 are concurrent , find the value of k.

Find the value of k for which the linear equations x + 2y = 3 and 5x + ky = 7, does not have a unique solution.

Find the value of k for which the linear equations x + 2y = 3 and 5x + ky = 7, does not has a unique solution.