Question

Encontre o valor de x na equação abaixo:

(3 x)
(2 4)=0

Answer 1

$\large\boxed{\begin{array}{l}\begin{pmatrix}\rm3&\rm x\\\rm 2&\rm4\end{pmatrix}=0\\\\\rm 3\cdot4-2\cdot x=0\\\rm 2x=12\\\\\rm x=\dfrac{12}{2}\\\\\rm x=6\end{array}}$