Jawaban:
D
Penjelasan dengan langkah-langkah:
langkah pengerjaan terlampir
Jawaban:
d. 2
Penjelasan dengan langkah-langkah:
x+y+z= 3
2x-y+3z= 11
4x+3y-2z= 1
Eliminasilah x:
(1) dan (2)
x+y+z= 3 (×2)= 2x+2y+2z= 6
2x-y+3z= 11(×1)= 2x-y+3z= 11
---------------------------------------- -
3y-z= -5
(1) dan (3)
2x-y+3z= 11(×2)= 4x-2y+6z= 22
4x+3y-2z= 1 (×1)= 4x+3y-2z= 1
'------------------------------------------ -
-5y+8z= 21
3y-z= -5 (×5)= 15y-5z= -25
-5y+8z= 21(×3)= -15y+24z= 63
------------------------------------------- +
19z= 38
z= 2
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