X-y+z=-4 2x+y+2z=-5 3x-y-z=-6
Matematika
hariz10251983
Pertanyaan
X-y+z=-4
2x+y+2z=-5
3x-y-z=-6
2x+y+2z=-5
3x-y-z=-6
1 Jawaban
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1. Jawaban amelswn
x - y + z = -4
x = -4 + y - z
2x + y + 2z = -5
2(-4 + y -z ) + y + 2z = -5
-8 +3y = -5
3y = 3
y = 1
x = -4 + y -z = -4 + 1 - z = -3 -z
3x - y - z = -6
3(-3-z) - y - z = -6
-9 - 3z - 1 - z = -6
-10 - 4z = -6
-4z = 4
z = -1
x = -3 - z = -3 - (-1) = -2