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Charra [1.4K]
3 years ago
15

X+2y-z = 9 -2x+y+z= 1 2x-y+2z= -5

Mathematics
1 answer:
hodyreva [135]3 years ago
7 0

Answer:

I don't understand the first one

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Anytime you have zero as a possible answer, you have to consider it carefully. Part of the whole number system is 0. They go up from there. No fraction is a whole number. No decimal is a whole number except those that are equal to  a whole number.

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