If 3x+ 4y-11 = 18 and 8x- 6y +12 = 6, th...

If 3x+ 4y-11 = 18 and 8x- 6y +12 = 6, then what is the value of 5x- 3y - 9?

A

18

B

`-9`

C

`-27`

D

`-18`

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