Question

Find the value of x and y using matrix method. 2x – 5y = 7 -2x + 4y = - 6

Answer 1

9514 1404 393

Answer:

  (x, y) = (1, -1)

Step-by-step explanation:

The augmented matrix of coefficients for these equations is ...

  $\left[\begin{array}{cc|c}2&-5&7\\-2&4&-6\end{array}\right]$

The row-reduction function of your calculator can find the solution to the system of equations. The result of using that function is ...

  $\left[\begin{array}{cc|c}1&0&1\\0&1&-1\end{array}\right]$

This tells you the solution is (x, y) = (1, -1).