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25-02-2019
Mathematics

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3x+2y=12 and 6x +3y=21

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nastya1902k nastya1902k

25-02-2019

3x+2y=12 |•2
6x+3y=21

6x+4y=24
6x+3y=21

0x+y=3
y=3; x=2

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