1.5.48 Systems of Algebraic Equations
условие: Решить систему уравнений по формулам Крамера, матричным методом и методом Гаусcа. \ [\ left \ {\ begin {array} {l} x_ {1} +2 x_ {2} +3 x_ {3} = 7 \\ 5 x_}+x_ {2} -2 x_ {3} =-7 \\ 3 X_ {1}+X_ {2}+X_ {3} = 2 \ END {Array} \ RIGHT. \]
Solving Systems of Algebraic Equations by the Methods of Gauss, Jordan-Gauss, Cramer and Using the Inverse Matrix. Homogeneous and non-Homogeneous Systems of Equations.