SSC Delhi Police Head Constable (Ministerial) 2025 Mock Test (New) Quantitative Aptitude Algebra

k के किस मान के लिए समीकरण निकाय 4x + 6y = 7 और 6x + (k + 4)y - 21 = 0 का एक अद्वितीय हल होगा?

1
k = 5
2
k ≠ 5
3
k = 7
4
k ≠ 7
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