Mathematics · 2021
JEE Main · 25 February 2021, Shift 1 · Q83
If the system of equations k x+y+2 z=1; 3 x-y-2 z=2; -2 x-2 y-4 z=3 has infinitely many solutions, then k is equal to \ \ \ \.
If the system of equations
$$\begin{aligned}
& \mathrm{k} x+y+2 z=1 \\
& 3 x-y-2 z=2 \\
& -2 x-2 y-4 z=3
\end{aligned}
$$
has infinitely many solutions, then k is equal to \_\_\_\_.
Official answer
21
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JEE Main 2021 Mathematics question, with the answer from NTA’s final answer key. Where our answers come from.