Linear equations involving with three variables,x=-2z+7,y=-3x+5 and 3z=2y+5
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Answer:
Let A=
⎣
⎢
⎢
⎡
1
3
2
−1
4
−1
2
−5
3
⎦
⎥
⎥
⎤
B=
⎣
⎢
⎢
⎡
7
−5
12
⎦
⎥
⎥
⎤
X=
⎣
⎢
⎢
⎡
x
y
z
⎦
⎥
⎥
⎤
Find ∣A∣
∣A∣=
∣
∣
∣
∣
∣
∣
∣
∣
1
3
2
−1
4
−1
2
−5
3
∣
∣
∣
∣
∣
∣
∣
∣
=1(12−5)+1(9+10)+2(−3−8)
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