The answer is A. x = 7/4 , y= 3/2 , [ 1 0 2 , 0 1 7, 0 0 1 ]
Z = -5/4
Using the scientific calculator, we generated the correct answer by using the EQN in Mode Button. Select EQN and press 2. It will lead you to the matrix table. Input the equations. If the variable has no value, input 1. If the variable is not shown input 0. Transpose the constants to the left side and the variables to the right side in order to get the correct signs. Press the equal sign and it will lead you to the correct answer.
This method is available for those who have the scientific calculator.