defence exam CISF Constable Driver 2025 Quantitative Aptitude Algebra Linear Equation in 2 Variable

যদি 20x + 5y + 11 = 0 এবং 50x - ky - 9 = 0 সমীকরণের কোনও সমাধান না থাকে, তবে k এর মান কত?

1
- 18
2
12.5
3
- 12.5
4
18
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