2/x+1/y=1 dan 1/x-2/y=8 tentukan nilai 1/x+y
Jawaban Terkonfirmasi
2/x + 1/y = 1 | × 1 | ⇒ 2/x + 1/y = 1
1/x - 2/y = 8 | × 2 | ⇒ 2/x – 4/y = 16 –
5/y = -15
y = -1/3
2/x + 1/y = 1
2/x + 1/(-1/3) = 1
2/x – 3 = 1
2/x = 4
x = 1/2
Jadi,
1/x + y = 1/(1/2) – 1/3 = 1 2/3