3x-4y+2z=10,2x-2y+2z=12,x+y+z=10 tentukan nilai x,y,dan z
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Pertanyaan
3x-4y+2z=10,2x-2y+2z=12,x+y+z=10 tentukan nilai x,y,dan z
2 Jawaban
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1. Jawaban Novi1811
3x-4y+2z=10
2x-2y+2z=12
x+y+z=10
1) eliminasi persamaan 1&2
3x-4y+2z=10 Ix1I 3x-4y+2z=10
2x-2y+2z=12 Ix1I 2x-2y+2z=12_
=) x- 2y =2
2) eliminasi persamaan 1&3
3x-4y+2z=10 Ix1I 3x -4y+2z=10
x + y+ z=10 Ix2 I 2x+2y+2z=20_
=) x-6y = -10
3) cari y
x-2y= -2
x-6y= -10_
(=) 4y = 8
y = 8/4
y = 2
4) cari x
x-2y = -2
x-2(2)= -2
x-4 =-2
x = 2
5) cari z
x+y+z = 10
2+2+z=10
4+z =10
z = 6
(x,y,z adalah 2,2,6)
semoga membantu ^-^ -
2. Jawaban agustina103
Cari x
3x-4y+2z=10
2x-2y+2z=12
------------------ --
x + -2y+0 = -2
x +-2y = -2
x = - 2+2
x = 0
Cari y
3x -4y +2z=10
3x.0 -4y +2z=10
0 -4y +2z= 10
-4y = 10-2
-4y = 8
y = 8/-4
y = -2
Cari z:
x+y+z=10
0+-2+z=10
-2+z=10
z =10+2
z = 12
Jdi, x = 0 , y = -2, dan z = 12
Maap klo salah