Algebra Archive: Questions from January 22, 2023
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73. CHALUENGE Solve \( 7^{3 x-1}=49^{x+1} \) for \( x \). (Hint: \( b^{x}=b^{y} \) if and only if \( x=y \).)2 answers -
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Solve the following system using Gauss-Jordan Elimination. \[ \begin{aligned} x+3 y+u & =-1 \\ 2 y+2 z+u & =1 \\ 2 x-4 y+z+u & =0 \\ x-2 y-z+u & =-2 \end{aligned} \] Select one: a. \( u=2, x=3, y=0, z2 answers