Question
Asked Jun 9, 2019
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solve the system

x-y+z=-1

x+y-2z=7

-2x+4y+2z=-4

x=

y=

z=

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Expert Answer

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Step 1

To solve the system

x-y+z=-1

x+y-2z=7

-2x-+4y+2z=-4

The system of equations are,

..-1)
x-y
x+ y 2: 7
(2)
..-3)
-2r+4y2-4
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..-1) x-y x+ y 2: 7 (2) ..-3) -2r+4y2-4

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Step 2

From equation 1.

-y =-1-x-2
v1+x
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-y =-1-x-2 v1+x

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Step 3

Substitute 1+x+z for y in equation 2 and equation ...

x1x
= 7
2x 6
...4)
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x1x = 7 2x 6 ...4)

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Algebra

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