Diketahui persamaan matriks [tex] \left[\begin{array}{ccc}4&3&\\3&2\end{array}\right] [/tex][tex] \left[\begin{array}{ccc}x\\y\end{array}\right][/tex] = [tex]
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Diketahui persamaan matriks [tex] \left[\begin{array}{ccc}4&3&\\3&2\end{array}\right] [/tex][tex] \left[\begin{array}{ccc}x\\y\end{array}\right][/tex] = [tex] \left[\begin{array}{ccc}12\\7\end{array}\right][/tex] Nilai dari 5x - 3y adalah
1 Jawaban
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1. Jawaban ekamiaww
4x+3y = 12 (x2) --> 8x+6y = 24
3x+2y = 7 (x3) --> 9x+6y = 21 _
-x = 3
x = -3
3x+2y = 7
3(-3)+2y = 7
-9+2y = 7
2y = 7+9
2y = 16
y = 8
5x-3y = 5(-3)-3.8
= -15-24
= -39