MCQMediumJEE Main 2025 · 22 January, Shift 2Solving Linear Equations (Matrix Method)

Mathematics Question from JEE Main 2025 · 22 January, Shift 2

If the system of linear equations: x+y+2z=6,x + y + 2z = 6, 2x+3y+az=a+1,2x + 3y + az = a + 1, x3y+bz=2b,-x - 3y + bz = 2b, where a,bRa, b \in \mathbb{R}, has infinitely many solutions, then 7a+3b7a + 3b is equal to:

  • A

    2222

  • B

    1616

  • C

    99

  • D

    1212

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