begin vmatrix x - 3 17 - 7 11 vmatrix -21 Find the value of x -

The correct option is A 6 x amp;3 7 amp;7 = 21 ⇒ 7× x 21 = 21 ⇒ 7x 21=21 ⇒ 7x = 21+21 ⇒ 7x = 42 ⇒ x= 42/7 ⇒ x= 6 ...

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Determinant

begin vmatrix...

Question

$∣ ∣ ∣ \begin{matrix} x & 3 7 & 7 \end{matrix} ∣ ∣ ∣ = 21$
Find the value of x?

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