Diketahui matriks A=![\left[\begin{array}{ccc}4a&8&4\\6&-1&-3b\\5&3c&9\end{array}\right]](https://tex.z-dn.net/?f=+%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D4a%268%264%5C%5C6%26-1%26-3b%5C%5C5%263c%269%5Cend%7Barray%7D%5Cright%5D "\left[\begin{array}{ccc}4a&8&4\\6&-1&-3b\\5&3c&9\end{array}\right]")
dan B=![\left[\begin{array}{ccc}12&8&4\\6&-1&-3a\\5&b8&9\end{array}\right]](https://tex.z-dn.net/?f=+%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D12%268%264%5C%5C6%26-1%26-3a%5C%5C5%26b8%269%5Cend%7Barray%7D%5Cright%5D+ "\left[\begin{array}{ccc}12&8&4\\6&-1&-3a\\5&b8&9\end{array}\right]")
. Jika A=B, maka tentukan nilai dari a+b+c!
ekamiaww
![\left[\begin{array}{ccc}4a&8&4\\6&-1&-3b\\5&3c&9\end{array}\right] = \left[\begin{array}{ccc}12&8&4\\6&-1&-3a\\5&8b&9\end{array}\right] \\ \\ 4a=12-> a=3 \\ \\ -3b=-3a \\ -3b=-3.3 \\ b=3 \\ \\ 3c=8b \\ 3c=8.3 \\ c=8 \\ \\ a+b+c = 3+3+8=14](https://tex.z-dn.net/?f=++%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D4a%268%264%5C%5C6%26-1%26-3b%5C%5C5%263c%269%5Cend%7Barray%7D%5Cright%5D+%3D++%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D12%268%264%5C%5C6%26-1%26-3a%5C%5C5%268b%269%5Cend%7Barray%7D%5Cright%5D++%5C%5C++%5C%5C+4a%3D12-%3E+a%3D3++%5C%5C+%5C%5C+-3b%3D-3a+%5C%5C+-3b%3D-3.3+%5C%5C+b%3D3++%5C%5C+%5C%5C+3c%3D8b+%5C%5C+3c%3D8.3+%5C%5C+c%3D8+%5C%5C++%5C%5C+a%2Bb%2Bc+%3D+3%2B3%2B8%3D14 "\left[\begin{array}{ccc}4a&8&4\\6&-1&-3b\\5&3c&9\end{array}\right] = \left[\begin{array}{ccc}12&8&4\\6&-1&-3a\\5&8b&9\end{array}\right] \\ \\ 4a=12-> a=3 \\ \\ -3b=-3a \\ -3b=-3.3 \\ b=3 \\ \\ 3c=8b \\ 3c=8.3 \\ c=8 \\ \\ a+b+c = 3+3+8=14")
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