Solve the systems in Problems (40-57) by the Gauss-Jordan method. (left{begin{array}{l}3 x+7 y=5 4 x+9 y=7end{array}ight.)
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Solve the systems in Problems \(40-57\) by the Gauss-Jordan method.
\(\left\{\begin{array}{l}3 x+7 y=5 \\ 4 x+9 y=7\end{array}ight.\)
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