Use Gaussian elimination with backward substitution and two-digit rounding arithmetic to solve the following linear systems. Do not reorder the equations. (The exact solution to each system is x_1=1,x_2=-1,x_3=3.)  -x_1+4x_2+x_3=8 5/3 x_1+2/3 x_2+2/3 x_3=1 2x_1+x_2+4x_3=11.

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Use Gaussian elimination with backward substitution and two-digit rounding arithmetic to solve the following linear systems. Do not reorder the equations. (The exact solution to each system is x_1=1,x_2=-1,x_3=3.)
 -x_1+4x_2+x_3=8
5/3 x_1+2/3 x_2+2/3 x_3=1
2x_1+x_2+4x_3=11.

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