Use technology to solve the system of equations. Express all solutions as decimals, rounded to one decimal place.   −0.2x  +  0.3y  +  0.4z  −  t  =  4.3   2.2x  +  1.1y  −  4.7z  +  2t  =  11.7       9.2y      −  1.3t  =  6.8   3.4x      +  0.5z  −  3.4t  =  0.1 (x, y, z, t) =

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