October 2018 1 37 Report
Quien sabe resolver el método de igualación 1: (4x-y= -9) ( 2x+2y= -2 )
2:( 2x3y= -1) (3x+2y= 4) 3: ( 2x+y= 6) (4x3y= 14)

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

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