railway RPF Constable Mock Test Series 2024 Quantitative Aptitude Algebra Linear Equation in 2 or more Variables

If the equations 6x – 5y + 11 = 0 and 15x + ky – 9 = 0 have no solution, then the value of k is:

1
-12.5
2
12.5
3
-18
4
18
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