A linear equations in the variables $x_1, x_2, ..., x_n$ should be of below form. $$a_1x_1 + a_2x_2 + ... + a_nx_n = b$$A System of linear equations(=linear system): a collention of one or more linear equations.$$x_1-2x_2=1$$$$-x_1+3x_2=3$$ Solution set: The set of all possible solutions of the linear system.→ Two linear systems are called Equivalent if they have the same solution set. A system ..
