anaidvilla121 anaidvilla121

13-01-2019
Mathematics

contestada

What’s The elimination 7x+4y=-4 5x+8y=28

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mathecoach mathecoach

13-01-2019

Answer:

7x + 4y = -4

5x + 8y = 28

II - 2*I

- 9·x = 36 --> x = -4

7*(-4) + 4y = -4 --> y = 6

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