\begin{pmatrix} 4 \\ -10 \end{pmatrix}
Question:
Compute $3 \begin{pmatrix} 2 \\ -8 \end{pmatrix} - 2 \begin{pmatrix} 1 \\ -7 \end{pmatrix}$.
Answer:
Let's think step by step.

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\begin{pmatrix} 4 \\ -10 \end{pmatrix}
Compute $3 \begin{pmatrix} 2 \\ -8 \end{pmatrix} - 2 \begin{pmatrix} 1 \\ -7 \end{pmatrix}$.
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