defence exam Agniveer Vayu Group X & XY Mock Test 01/2026 Mathematics Statistics Correlation and Regression

यदि x + 4y + 1 = 0 और 4x + 9y + 7 = 0, दो समाश्रयण रेखाएँ हैं, तो जब y = -3 है तो x का मान क्या है?

1

-13

2

-5

3

5

4

7

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