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3xy+8xy=11xy-2xy= 9xy
-6x-2x= -8x +x = -7x
y
Resultado final: de la primera es: 6x
de la segunda: 9xy-7x+y
2)=(x-6x-2x)+(3xy+8xy-2xy)+y
=(-7x+9xy+y)
Espero haberte ayudado C;