If 3 x + 4 y - 2 z + 9 = 17 , 7 x + 2y ...

If ` 3 x + 4 y - 2 z + 9 = 17 , 7 x + 2y + 11 z + 8 = 23 and` `
` `5x + 9y + 6z - 4 = 18` , then what is the value of ` x + y + z - 34` ?

A

`-28`

B

`-14`

C

`-31`

D

`-45`

Text Solution

Verified by Experts

The correct Answer is:

C

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