pembahasan :
[a 4] = 2 [2c - 3b a ]
2b 3c 2a + 1 b + 7
4 = 2a
2 = a
2b = 2 (2a +1)
2b = 2(5) (2 coret 2)
b = 5
3c = 2b + 14
3c = 24
c = 8
kembali ke soal a + b + c = 2 + 5 + 8 = 15
Baca Juga: Bocoran Soal PAS Fisika Kelas 11 SMA Semester 1 K13, Full Prediksi Pembahasan 2021
5. Jika [ 1 -6] [x] = [-10] nilai [x] = ...
1 -2 y 1d y
pembahasan :
[ x - 6y] = [-10]
x - 2y 18