Question

resolva a equação!!!!!​

Answer 1

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$\boxed{\begin{array}{c}\sf Resolva~a~equac_{\!\!,}\tilde ao:\end{array}}\begin{vmatrix}\sf2&\sf4&\sf-2\\\sf2&\sf1&\sf x\\\sf3&\sf4&\sf-3\end{vmatrix}=\sf24\\\rm\underline{soluc_{\!\!,}\tilde ao}:\\\sf 2\cdot(-3-4x)-4\cdot(-6-3x)-2\cdot(8-3)=24\\\sf-6-8x+\diagdown\!\!\!\!\!\!24+12x-10=\diagdown\!\!\!\!\!\!24\\\sf 12x-8x=10+6\\\sf 4x=16\\\sf x=\dfrac{16}{4}\\\huge\boxed{\boxed{\boxed{\boxed{\sf x=4\checkmark}}}}$