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

যদি 6x - 5y + 11 = 0 এবং 15x + ky - 9 = 0 সমীকরণগুলির কোনও সমাধান না থাকে, তবে k এর মান কত?

1
-12.5
2
12.5
3
-18
4
18
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