Use the matrix method to solve the system of equations 2x + 4y = 8 and 6x + 3y = -3. the resulting matrix is: 1 0 -2 0 1 3 1 0 2 0 1 3 0 1 -2 1 0 3

The calculator function that puts the augmented matrix

into reduced row-echelon form will give you an identity matrix in the left columns and the solution in the rightmost column:

This corresponds to the first selection.