#staymarried: 30-Minute Weekly Devotions to Grow in Faith and Joy from I Do to Ever After

#staymarried: 30-Minute Weekly Devotions to Grow in Faith and Joy from I Do to Ever After

Matematika Sekolah Menengah Atas BANTU SOAL MATEMATIKA WAJIB KELAS 10​

BANTU SOAL MATEMATIKA WAJIB KELAS 10​

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

[answer.2.content]