September 2018 1 28 Report
Encontrar por sumas y restas, la pareja ordenada que hace verdaderos los siguientes sistemas.
1) 5x-y=2
-7x+y= -4

2) 3x+4y= -5
2x-y= 4

3) 5x+3y= 17
x-1+3y= 0

4) 4x+2y= 5
5x-3y= -2

5) x+5= -4y
2x-12= 3y

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