Apabila x dan y merupakan penyelesaian dari persamaan - persamaan x + 8 = 2 (y + 3) dan x - 4y = 4(x - 2y + 2), nilai dari 2x - 3y adalah .....
MicoArrafi
![$\begin{align} x+8&=2(y+3)\\x+8&=2y+6\\x-2y&=-2\\3x-6y&=-6...[~pers.1~] \end{align}](https://tex.z-dn.net/?f=%24%5Cbegin%7Balign%7D+x%2B8%26%3D2%28y%2B3%29%5C%5Cx%2B8%26%3D2y%2B6%5C%5Cx-2y%26%3D-2%5C%5C3x-6y%26%3D-6...%5B%7Epers.1%7E%5D+%5Cend%7Balign%7D "$\begin{align} x+8&=2(y+3)\\x+8&=2y+6\\x-2y&=-2\\3x-6y&=-6...[~pers.1~] \end{align}")
![$\begin{align} x-4y&=4(x-2y+2)\\x-4y&=4x-8y+8\\3x-4y&=-8...[~pers.2~] \end{align}](https://tex.z-dn.net/?f=%24%5Cbegin%7Balign%7D+x-4y%26%3D4%28x-2y%2B2%29%5C%5Cx-4y%26%3D4x-8y%2B8%5C%5C3x-4y%26%3D-8...%5B%7Epers.2%7E%5D+%5Cend%7Balign%7D "$\begin{align} x-4y&=4(x-2y+2)\\x-4y&=4x-8y+8\\3x-4y&=-8...[~pers.2~] \end{align}")
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