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vredina [299]
3 years ago
12

Х - Зу = 72х - бу = 12need help.solving systems by elimination.​

Mathematics
1 answer:
Zanzabum3 years ago
6 0

{x - 3y = 7              | · (-2)

{2x - 6y = 12

{-2x + 6y = -14

{2x - 6y = 12                    (+)

---------------------------------------

-2x + 2x + 6y + (-6y) = -14 + 12

0 = -2

contradiction

x, y ∈ ∅

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