Question

(3 -4) ( x) sama dengan 3 (1) maka x+y? soal matrik mohon bantuannya
(5 -6 ) ( y) (2)

Answer 1

Saya tidak tau...........................

Answer 2

Bawa ke spl2v biasa aja :
3x - 4y = 3 (kali 3) ----> 9x - 12y = 9
5x - 6y = 6 (kali 2) ----> 10x - 12y = 12
eliminasi,
9x - 12y = 9
10x - 12y = 12
---------------------- (-)
-x = -3
x = 3
substitusi,
9x - 12y =9
9(3) - 12y =9
27 - 12y = 9
12y = 27 - 9
12y = 18
y = 18/12 = 3/2

jadi, x + y = 3 + 3/2 = 9/2