Mohon bantuannya. Menggunakan cara

Mohon bantuannya. Menggunakan cara

Jawaban Terkonfirmasi

Matriks
Kelas X

$left(begin{array}{cc}2 & 1 \ 1 & -3 end{array}right) left(begin{array}{cc}2 -x \ 3x + 2y end{array}right) = left(begin{array}{cc} 13 \ -4 end{array}right) \ left(begin{array}{cc} 4 - 2x + 3x + 2y \ 2 - x - 9x - 6y end{array}right) = left(begin{array}{cc} 13 \ -4 end{array}right) \ left(begin{array}{cc} x + 2y + 4 \ -10x - 6y + 2 end{array}right) = left(begin{array}{cc} 13 \ -4 end{array}right)$

x + 2y + 4 = 13
x + 2y = 9 |x 3|
3x + 6y = 27 … (i)

-10x – 6y + 2 = -4
10x + 6y = 6 … (ii)

Eliminasi (i) dan (ii)

3x + 6y = 27
10x + 6y = 6
––––––––– (–)
-7x = 21
x = -3

3(-3) + 6y = 27
6y = 27 + 9
6y = 36
y = 6

5y – 2x = 5(6) – 2(-3)
= 30 + 6 = 36

5y – 2x = 5(6) – 2(-3) = 36