heyimazl
( 2x + y + z ) - ( x + y ) = 4 - 1 2x + y + z - x - y = 3 2x - x + y - y + z = 3 x + z =3
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pjcancer13
X + y = 1 jadi x = 1 - y Y + z = 6 jadi z = 6 - y Masukkan ke persamaan 2x + y + z = 4 2(1-y) + y + (6-y) = 4 2 - 2y + y + 6 - y = 4 8 - 2y = 4 -2y = 4-8 = -4 Y = -4/-2 = 2
Masukkan y ke persamaan x + y = 1 X + 2 = 1 X = 1-2 = -1
Masukkan y ke persamaan y + z = 6 2 + z = 6 Z = 6-2 = 4
2x + y + z - x - y = 3
2x - x + y - y + z = 3
x + z =3
Y + z = 6 jadi z = 6 - y
Masukkan ke persamaan 2x + y + z = 4
2(1-y) + y + (6-y) = 4
2 - 2y + y + 6 - y = 4
8 - 2y = 4
-2y = 4-8 = -4
Y = -4/-2 = 2
Masukkan y ke persamaan x + y = 1
X + 2 = 1
X = 1-2 = -1
Masukkan y ke persamaan y + z = 6
2 + z = 6
Z = 6-2 = 4
Jadi x + z =
-1 + 4 = 3
Semoga membantu