Tentukan nilai x dan y yang memenuhi sistem persamaan berikut menggunakan metode substitusi
A.3y + 2x = 6
4y - 2x = 15
B.6x + 2y = 7
8x - 4y = 9
tolong jawab ya kak
A.3y + 2x = 6
4y - 2x = 15
B.6x + 2y = 7
8x - 4y = 9
tolong jawab ya kak
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7y-15=6
7y=21
y=3
4(3)-2x=15
12-2x=15
-2x=15-12
x= -1/2
HP = {-1/2,3}
3y + 2x = 6
2x = 6 - 3y
4y - 2x = 15
4y - 15 = 2x
subtitusikan
4y - 15 = 6-3y
7y = 21
y = 3
2x = 6 - 3y
2x = 6 - 9
2x = -3
x = -3/2
B.
6x + 2y = 7
2y = 7 - 6x
4y = 14 - 12x
8x - 4y = 9
4y = 8x - 9
14-12x = 8x -9
23 = 20x
x = 23/20
4y = 14 - 12(23/20)
4y = 14 - 69/5
4y = 70/5 - 69/5
4y = 1/5
y = 1/20