Find the coordinate vector $[x]_B$ of $x$ relative to the given basis $B = \{b_1, b_2, b_3\}$ $b_1 = egin{bmatrix} 1 \ 0 \ 5 \end{bmatrix}, b_2 = egin{bmatrix} 4 \ 1 \ 20 \end{bmatrix}, b_3 = egin{bmatrix} 1 \ -1 \ 4 \end{bmatrix}, x = egin{bmatrix} -6 \ 2 \ -27 \end{bmatrix}$ $[x]_B = ?$ (Simplify your answer)
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