Question

Tolong di kerjakan besok di kumpulkan
kasih caranya

Answer 1

1). x + 15y + 4 = 0
x = -15y - 4

4x + 2y - 13 = 0
4(-15y - 4) + 2y - 13 = 0
-60y -16 + 2y - 13 = 0
-58y = 29
y = -1/2

2). 2x + y = 15 | x2 | 4x + 2y = 30
3x + 2y = -8
4x + 2y = 30
dikurangi
-x = -38
x = 38
Substitusi
2x + y = 15
2(38) + y = 15
76 + y = 15
y = -61

3). 4x + y = 12 | x2 | 8x + 2y = 24
5x + 2y = 9
8x + 2y = 24
dikurangi
-3x = -15
x = 5
Substitusi
4x + y = 12
4(5) + y = 12
20 + y = 12
y = -8

Kalau kurang jelas tanya aja, maaf kalau salah. Semoga membantu ^^