SOLUTION: Obtain an equivalent system by performing the stated elementary operation on the system. Replace the first equation by the sum of itself and -3 times the second equation. -4x-15y+

Algebra ->  Finance -> SOLUTION: Obtain an equivalent system by performing the stated elementary operation on the system. Replace the first equation by the sum of itself and -3 times the second equation. -4x-15y+      Log On


   

Question 1064741: Obtain an equivalent system by performing the stated elementary operation on the system. Replace the first equation by the sum of itself and -3 times the second equation.
-4x-15y+2z=-16
6x-11y+14z=-18
4x+10y-12z=-12
5x+12y+13z=10
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
So then,
-4x-15y%2B2z-3%286x-11y%2B14z%29=-16-3%28-18%29
-4x-15y%2B2z-%2818x-33y%2B42z%29=-16%2B54
-4x-15y%2B2z-18x%2B33y-42z=38
-22x%2B18y-40z=38
So then replacing it the system becomes,
-22x%2B18y-40z=38
6x-11y%2B14z=-18
4x%2B10y-12z=-12
5x%2B12y%2B13z=10