SOLUTION: Solve each of the following linear systems by Gaussian elimination. a) 5x - 4y = -25 -3x + 2y = 11 b) 7x + 5y - 2z = 57 -6x - 2y + 9z = -190 x + 4y + 2y = 11

Algebra ->  Matrices-and-determiminant -> SOLUTION: Solve each of the following linear systems by Gaussian elimination. a) 5x - 4y = -25 -3x + 2y = 11 b) 7x + 5y - 2z = 57 -6x - 2y + 9z = -190 x + 4y + 2y = 11      Log On


   

Question 861536: Solve each of the following linear systems by Gaussian elimination.
a) 5x - 4y = -25
-3x + 2y = 11
b) 7x + 5y - 2z = 57
-6x - 2y + 9z = -190
x + 4y + 2y = 11
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
7x + 5y - 2z = 57
-6x - 2y + 9z = -190
x + 4y + 2y = 11
7,5,-2,57
-6,-2,9,-190
1,4,2,11
determinant = -131
x = 1591/-131 = -12.1450382
y = -2404/-131 = 18.351145
z = 3292/-131 = -25.129771