# SOLUTION: I am not understanding how to Solve the system of linear equation using matrices x+y+z=3 2x -z=7 5y+z=4 Can you guide me step by step in solving it?

Algebra ->  Algebra  -> Coordinate Systems and Linear Equations -> SOLUTION: I am not understanding how to Solve the system of linear equation using matrices x+y+z=3 2x -z=7 5y+z=4 Can you guide me step by step in solving it?      Log On

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 Click here to see ALL problems on Linear-systems Question 412052: I am not understanding how to Solve the system of linear equation using matrices x+y+z=3 2x -z=7 5y+z=4 Can you guide me step by step in solving it?Answer by ewatrrr(10682)   (Show Source): You can put this solution on YOUR website! ``` Hi Note: finding the value of a 3x3 matrix is done as follows: = a1(b2c3-c2b3) - b1(a2c3-c2a3) + c1(a2b3-b2a3) x+y+z=3 2x -z=7 5y+z=4 D = = 13 1*5 -1*2 +1*10 = 13 = 39 = 13 = -13 x= 39/13 = 3 y = 13/13 = 1 z =-13/13 = -1 ```