Make sure you carefully distributed all multiples to the correct numerators to match what you muliplied to your denominator. Pay close attention to the method used to eliminate variables in order to get from four variables to ONE. Also, don't forget to plug in the variables in the right area.
Make sure you pay attention to how I solved for the overall equation by getting the least common denominator. This method is repeated in Part 2. You should also make sure you factor completely and correctly set up the like terms. Remember how to use rref( on your graphing calculator.
Pay attention to the vocabulary because they will be used later on. You should also pay attention to how i solved for the Row-Echelon Form. Another thing to look out for is the correct method of using rref( to check your answer and the identity of an inconsistent system.
My screen-recorder only lets me record for 5 minutes each video so there are two videos to watch... Thanks for your patience! Goodnight.