Question: For the following system to be consistent, 5 x+ 7 y +-5z=3 6 x+ 9 y+kz=-5 39 x+ 15 y-21z=-32 we must have k ______

For the following system to be consistent,

5x+7y+-5z=3

6x+9y+kz=-5

39x+15y-21z=-32

we must have k______

.

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