Page 61 - KM Matematika-BS-KLS-VIII

Penguatan 2 Sistem Persamaan

Gunakan materi yang sudah dipelajari baik saat
belajar maupun saat berlatih.

Selesaikan setiap sistem persamaan berikut.

1 Menggunakan Metode Eliminasi x = 2y + 6
3
3x + y = 17 2x + 3y = 5
1
x – y = 3 9x – 2y = –1
4
2x + 5y = 1 y = 3x + 1
2
2x + y = 5 y = 2x – 1
5
–x + 3y = –8 y = –3x + 14
3
x – 4y = 9 2x = 3y – 1 BAB 2 | Sistem Persamaan Linear Dua Variabel
6
3x + y = 7 2x = 5y – 7
4
x + 2y = 9
3 Aneka Sistem Persamaan
x – 2y = 3
5
5x – 6y = 7 8x = 5y + 2
1
–2x + 5y = –15 5 – 3x = –4y
6
4x – 9y = 27 3(2x + 1) + 5y = –5
2
3x – 2y = –11 –7x – 4(y + 3)= –10
7
2x + 3y = –3 0,5x – 1,4y = 8
3
4x + 3y = 0 –x + 2y = –12
8
5x – 2y = –23 0,35x – 0,12y = –1,5
4
5x – 7y = –16 –2x + 3y = –3
9
–4x – 3y = 30 1 1
x – y = 1
6 8
2 Menggunakan Metode Substitusi 5
2x + y = 2
y = x + 2
1 6x + 5y = 9
3x + y = 14
6
x + 3y = 3 3x – 2y = –1
2 6
x = –y + 2
7 2x – y = 3x + y = –10

8 x – 2y = 4x + 3y = 1 – 4y

Jawaban pada Hlm.229, 230

Bab 2 Sistem Persamaan Linear Dua Variabel 43