Cara penyelesaian SPLTV 2X+Y+Z=-9 3Y-2Z=-4 8Z=-8
Matematika
Martiah
Pertanyaan
Cara penyelesaian SPLTV
2X+Y+Z=-9
3Y-2Z=-4
8Z=-8
2X+Y+Z=-9
3Y-2Z=-4
8Z=-8
2 Jawaban
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1. Jawaban amam1
1). 8z = -8
z = -1
2). 3y - 2z = -4
3y - 2(-1) = -4
3y + 2 = -4
3y = -4-2
3y = -6
y = -2
3). 2x + y + z = -9
2x - 2 - 1 = -9
2x = -9+2+1
2x = -6
x = -3 -
2. Jawaban missdiyun
2X+Y+Z=-9
3Y-2Z=-4
8Z=-8 .... z = -1
substitusikan z = -1 ke 3y - 2z = -4
3y - 2(-1) = -4
3y +2=-4
3y = -4-2
3y = -6
y= -2
z=-1 dan y= -2 substitusikan ke 2x +y + z = -9
2x + (-2) + (-1) = -9
2x -2-1 = -9
2x -3 =-9
2x = -9+3
2x = -6
x = -6/2
x = -3
jadi x = -3, y =-2 , z = -1