tolong bantu ya beserta caranya

2 R = S

Maka :
___________________________
2 -1 1 x+y -2 2z
2 x ( -2 -1 -3 ) = ( -4 x 6 )
-3 1 -2 -6 2 -4
___________________________
4 -2 2 x+y -2 2z
[ -4 -2 -6 ] = [ -4 x 6 ]
-6 2 -4 = -6 2 -4
____________________________

Unsur yg seletak :
-2 = x
2z = 2 maka z = 1
x+y = 4
-2+y = 4
y = 4+2
y = 6

maka x + y + z = -2 + 6 + 1
= 5

Bagian C.