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Santhus halos 471021 ()) ( ) 2y + 27 = 1, Ix - 2y = 2 6x - 2y = 67, -18 . ws

User Petrika
by
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1 Answer

4 votes

-6x-2y+2z=-8 (a)

3x-2y-4z=8 (b)

6x-2y-6z=-18 (c)

Subtract (b) to (a)

-6x-2y+2z=-8

-

3x-2y-4z=8

___________

-9x + 6z = - 16 (d)

Subtract (b) to (c)

6x-2y-6z=-18

-

3x-2y-4z=8

___________

3x -2z = -26 (e)

Now, we have a system of 2 equations:

-9x + 6z = - 16 (d)

3x -2z = -26 (e)

Multiply (e) by 3 and add both equations, to eliminate x

-9x + 6z = - 16

+

9x - 6z = -78

___________

0 = -94

the system has no solutions

User Neil Stevens
by
8.5k points
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