1.5.22 Systems of Algebraic Equations
Condition: Solve the system of equations using the Kramer formulas: \ [\ left \ {\ begin {array} {c} 11 x_ {1} +7 x_ {2}+x_} +5 x_ {4} =-2 \\ 7 x_ {1}+x_ {2} +4 +4 +4 +4 +4 +4 +4 +4 +4 +4 +4 x_ {3} +3 x_ {4} = 4 \\ 12 x_ {1} +6 x_ {2} +11 x_ {3} +7 x_ {4} = 15 \\ 9 x_ {1} +5 x_ {2} +6 x_ {3} +5 x_ {4} = 6 \ 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.