x - y - z = -1
-x + y + y = 1
x + y - z = 1
ANSWERS
2015-11-09 22:12:36
hello : X - y - z = -1 ...(1) -x + y + z = 1 ...(2) x + y - z = 1 ...(3) (2) +(3) : 2y = 2 y = 1 subsct in (1) and (2) : x - z =0 -x +z = 0 so x = z the solution has form : (x , 1 , x ) .... x in R
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