What is the value of x in the matrix equation? 3 halves the 2 by 2 matrix row 1, x 6 row 2, 8 4 plus y the 2 by 2 matrix row 1, 1 4 row 2, 3 2 is equal to the 2 by 2 matrix, row 1, column 1, z column 2, z row 2, column 1, 6 z column 2, 2