Mathematics, 17.10.2021 22:10, flamingtacos4026
-x+6y-4z=17 / -4x-y-4z=7 / -x+y+5z=-15 solve using substitution
Answers: 1
Is correct 
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-x+6y-4z=17 / -4x-y-4z=7 / -x+y+5z=-15 solve using substitution...
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