5/5 (x-4)=40/5
X+4=8
X=8-4
X=4
Step-by-step explanation:
A=⎣⎢⎢⎡324−21−33−12⎦⎥⎥⎤,x=⎣⎢⎢⎡xyz⎦⎥⎥⎤,B=⎣⎢⎢⎡814⎦⎥⎥⎤
∣A∣=⎣⎢⎢⎡324−21−33−12⎦⎥⎥⎤
=3[1−3−12]−1(−2)[24−12]+3[241−3]⇒3(2−3)−2(4+4)+