No.1 Check the compatibility of the system of equations and, if compatible, solve it:
a) according to the Cramer formula; b) using the inverse matrix; c) the Gauss method.

No.2 Check the compatibility of the system of equations and, if compatible, solve it:
a) according to the Cramer formula; b) using the inverse matrix; c) the Gauss method.

No.3 Solve a homogeneous system of linear algebraic equations.

No.4 Solve a homogeneous system of linear algebraic equations.