the vector ⎡⎣⎢⎢−2028⎤⎦⎥⎥ is a linear combination of the vectors ⎡⎣⎢⎢132⎤⎦⎥⎥ and ⎡⎣⎢⎢−6−9−6⎤⎦⎥⎥ if and only if the matrix equation ⃗ =⃗ has a solution ⃗ , where