Algebra Examples

$[\begin{array}{c} 1300 & 1400 \\ 2000 & 1800 \\ 1600 & 1200 \end{array}]$

Step 1

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$[\begin{array}{c} 1300 & 1400 \\ 2000 & 1800 \\ 1600 & 1200 \end{array}]$