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x+y=110
4x+2y=306
hacemos reduccion:
-2(x+y=110)...........-2x-2y= -220
4x+2y=306.............4x+2y=306
2x=86........x=86/2........x=43
si x=43
x+y=110
43+y=110
y=110-43
y=67
hay 43 coches y hay 67 motos
y sumaria 20 motos por 2= 40......=
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