a + 6b = 29
a + 11b = 49
___________ -
-5b = -20
b = 4
a = 29 - 6b
a = 29 -6(4)
a = 5
a + 8b
= 5 + 8 (4)
= 37
jadi suku ke-9 = 37
Baca Juga: 15 Bocoran Soal PAS UAS Matematika Peminatan Kelas 10 Semester 1, Update Terbaru 2021-2022
12 Himpunan penyelesaian
3x + 27 - z = 4
5x + 2y + z = 12
x + 3y + 2z = 13
penyelesaian :
3x + 27 - z = 4 (1)
5x + 2y + z = 12 (2)
x + 3y + 2z = 13 (3)
eliminasi (1,2)
3x + 2y - z = 4
5x + 2y + x = 12
_______________ +
8x + 4y = 16 --> (4)