Posted by Sue on Tuesday, March 22, 2011 at 6:57pm.
2 X = -2Y - Z
X = -Y - Z/2
-Y =
-2 +7 -4
+1 -1 +0
-Z/2 =
-3/2 -2/1 -1/2
-2/1 -1/1 +2/1
sum =
-3.5 + 9 -4.5
- 1 - 2 +2
are you sure 9 and 2 is right??
No careless
sum =
-3.5 + 5 -4.5
- 1 - 2 + 2
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