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24-01-2020
Mathematics

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-4x-y=11
4x + 4y = -20

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cecilialopez046 cecilialopez046

24-01-2020

4x+4y=-20
-4x -4x
__________
4y=-4x-20
___ ____
4 4
-4
Y= —x-5
4

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