argh...im so stupid. i realised that you were looking at the linear equations.....im so sorry...they are seperate question. my question asks....for the original matrix in my 1st post....
a) Find the values of k for which A is invertible ---> for which the answer is all real numbers except 2
b) solve the linear systems. you may find your answer in(a) helpful..----> which means that i can substitute the values from the linear system as they are real numbers but not the value "2"..and then find the inverse of teh matrix and solve the linear equation or just doing it simultaneously.
i didnt mean to confuse you or myself...sorry