Given a matrix a belonging to K^((m x n)) and a vector v belonging to the vector space K^((m)), return true iff the system of linear equations x * a = v is consistent. If the system is consistent, then the function will also return:

• A particular solution v;
• The kernel K of a so that (v + k) * a = w for k in K.

Given a matrix a belonging to K^((m x n)) and a vector v belonging to the vector space K^((m)), solve the system of linear equations x * a = v for x. The function returns two values:

• A particular solution v;
• The kernel K of a so that (v + k) * a = w for k in K.