I am having a real trouble with this one. Any body good with linear equations?

0 ⤊

I am having a real trouble with this one. Any body good with linear equations?

31X + 12Y - 24Z = 105

18X + 24Y + Z = 77

12X - 6Y + 4Z = 5

2007-08-13 16:59:51 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics

2 answers

18X + 24Y + Z = 77
48X - 24Y + 16Z = 20
--------------------------------
by adding you will find
66x+17z=97

-62X -24Y +48Z = -210
18X + 24Y + Z = 77
-------------------------------------
-44x+49z= -133

66x+17z=97
-44x+49z= -133
-------------------------------
132x+34z= 194
-132x+ 147z= -399
----------------------------
181z=-205

z=-205/181=-1,13
x=?
y=?

try to continue

2007-08-13 17:21:30 · answer #1 · answered by iyiogrenci 6 · 0⤊ 0⤋

x=1.7614264
y=1.934455
z=-1.1325967

2007-08-13 17:15:40 · answer #2 · answered by IG64 5 · 0⤊ 0⤋