X - y - z = - 1

-x + y + y = 1

x + y - z = 1

Question

Gia Holt

Mathematics

7 March, 20:15

X - y - z = - 1

-x + y + y = 1

x + y - z = 1

+3

Answers (1)

Know the Answer?

Zaid Meyers · Answer 1

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

X - y - z = - 1-x + y + y = 1x + y - z = 1

X - y - z = - 1

-x + y + y = 1

x + y - z = 1