SOLUTION: Solve for x, y, and z variables of this systems of equations problem: 3x + 2y + z = 7, 5x + 5y + 4z = 3, 3x + 2y + 3z = 1 Please show steps

Algebra ->  Linear-equations -> SOLUTION: Solve for x, y, and z variables of this systems of equations problem: 3x + 2y + z = 7, 5x + 5y + 4z = 3, 3x + 2y + 3z = 1 Please show steps      Log On


   

Question 674360: Solve for x, y, and z variables of this systems of equations problem: 3x + 2y + z = 7, 5x + 5y + 4z = 3, 3x + 2y + 3z = 1
Please show steps
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi

3x + 2y + z = 7, 

5x + 5y + 4z = 3  ||Mulitply 1st Eq by -5 and 2nd EQ by 3 and add

    5y+%2B7z+=+-26    || 5y+-+21+=+-26

3x + 2y + z = 7

3x + 2y + 3z = 1

           2z = -6

            z = -3,  y = -1 and x = 4  +3x+-2+-3+=+7