Memakai tahap eliminasi dan subsitusi . (Pake jalannya/cara jawab ) thx
RofzulRofifatuz
X - y = 1 ............ 1 x + z = -1 ........... 2 y - z = 6 ..............3 persamaan 1 & 2 persamaan 3 & 4 x - y = 1 y - z = 6 x - 4 = -1 x + z = -1 -y - z = 2 x = 3 ________ - ___________ + -y -z = 2 ...... 4 -2z = 8 -y + 4 = 2 z = -4 -y = -2 y = 2
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fidelavivic03
X - y = 1 ... (1) X + z = -1 ...(2) Y - z =6 ...(3)
X-y=1 <=> y = x - 1 ...(4)
Substitusi ke pers.(3) y - z = 6 (x-1) - z = 6 X- z = 7 ...(5)
Eleminasi X + z = -1 X - z = 7 ------------- - 2z = -8 Z = -4
Substitusi nilai z ke pers. (5) X - z = 7 X -(-4) = 7 X = 3
Substitusi nilai x ke pers.(4) Y = x -1 = 3-1 = 2
Jadi, nilai x,y,z berturut-turut adalah 3, 2, -4 .
x + z = -1 ........... 2
y - z = 6 ..............3
persamaan 1 & 2 persamaan 3 & 4
x - y = 1 y - z = 6 x - 4 = -1
x + z = -1 -y - z = 2 x = 3
________ - ___________ +
-y -z = 2 ...... 4 -2z = 8
-y + 4 = 2 z = -4
-y = -2
y = 2
X + z = -1 ...(2)
Y - z =6 ...(3)
X-y=1 <=> y = x - 1 ...(4)
Substitusi ke pers.(3)
y - z = 6
(x-1) - z = 6
X- z = 7 ...(5)
Eleminasi
X + z = -1
X - z = 7
------------- -
2z = -8
Z = -4
Substitusi nilai z ke pers. (5)
X - z = 7
X -(-4) = 7
X = 3
Substitusi nilai x ke pers.(4)
Y = x -1
= 3-1
= 2
Jadi, nilai x,y,z berturut-turut adalah 3, 2, -4 .