# Row operations to solve a system of equations

• May 30th 2009, 09:42 AM
rpatel
Row operations to solve a system of equations
Hi

I need help in solving a question involving row operations by converting the equations in a matrix.

i have attached the question

thank you

(Wink)
• May 30th 2009, 01:17 PM
NonCommAlg
Quote:

Originally Posted by rpatel
Hi

I need help in solving a question involving row operations by converting the equations in a matrix.

i have attached the question

thank you

(Wink)

write the augmented matrix of the system and do the row operations until your matrix is in an echelon form, which is: $\begin{bmatrix}1 & 1 & 1 & | & 1 \\ 0 & -1 & -3 & | & -1 \\ 0 & 0 & a-4 & | & 0 \end{bmatrix}.$ you should be able to finish the proof now.