Tolong bantu dan jelaskan ya kak makasih
Penjelasan dengan langkah-langkah:
1. eliminasi
3x + y – 11 = 0
2x – y – 4 = 0
__________ +
5x – 15 = 0
5x = 15
x = 15/5
x = 3
substitusi x = 3
3x + y – 11 = 0
3(3) + y – 11 =0
9 + y – 11 = 0
y – 2 = 0
y = 2
x – 2y = 3 – 2(2) = 3 – 4 = -1
2.
1/2 x + y = 8 …dikali 2
x + 2y = 16
3x – 1/2 y = 9 … dikali 2
6x – y = 18
eliminasi
x + 2y = 16 |×1 | x + 2y = 16
6x – y = 18 |×2 | 12x – 2y = 36
___________ +
13 x = 52
x = 52/13
x = 4
substitusi x = 4
x + 2y = 16
4 + 2y = 16
2y = 16 – 4
2y = 12
y = 12/2
y = 6
4x – 3y = 4(4) – 3(6) = 16 – 18 = -2