September 2018 1 49 Report
Sistemas de 2x2

por método de suma y resta
-6x-3y=180
2x+y=200

por suma y resta o igualacion
15x+7y=58
6x+12y=79

16x+4y=234
19x+3y=297

8x+3y=99
10x+7y=199

7x+13y=250
2x+y=20

18x+3y=998
15x+4y=589

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