RESPUESTA:
6x + y = 25
-(x + y = 10)
_________
-x - y = -10
5x = 15
x = 3//
....
REEMPLAZAMOS:
x + y = 10
3 + y = 10
y = 7//
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RESPUESTA:
6x + y = 25
-(x + y = 10)
_________
6x + y = 25
-x - y = -10
_________
5x = 15
x = 3//
....
REEMPLAZAMOS:
x + y = 10
3 + y = 10
y = 7//