exam Maths Puzzle Numerical Ability

Find k if the following system of equations has no solution
3x + 2y = 6
kx + (k - 1)y = 9
a1/a2 = b1/b2 ≠ c1/c2

3x + 2y = 6

a =3
b =4
c =6


kx + (k - 1)y = 9

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