jika p=2x-y+z untuk x,y dan z merupakan penyelesaian sistem persamaan —-x+3y+3z=14 x+3y+3z=16 -2x+3y+z=7 nilai p =…..?
Jawaban Terkonfirmasi
– x + 3y + 3z = 14
x + 3y + 3z = 16
– 2x + 3y + z = 7
– x + 3y + 3z = 14
x + 3y + 3z = 16
____________ —
– 2x = – 2
x = 1
x + 3y + 3z = 16
1 + 3y + 3z = 16
3y + 3z = 16 – 1
3y + 3z = 15
y + z = 5
y = 5 – z
– 2x + 3y + z = 7
– 2 + 3(5 – z) + z = 7
– 2 + 15 – 3z + z = 7
– 2z = 7 + 2 – 15
– 2z = 9 – 15
– 2z = – 6
z = 3
y = 5 – z
y = 5 – 3
y = 2
p = 2x – y + z
p = 2 – 2 + 3
p = 3
Maaf Kalau Salah