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2x - y - x + 2y [ 3x + 3y - ( 4x -2y)]
= x + y - ( 5 y - x)
= x + y - 5y + x
= 2x - 4y
Espero que te sirva! Saludos!
2x - y - [3x - (4x - 2y) + 3y] - x + 2y
2x - y - [3x - 4x + 2y + 3y] - x + 2y
Agrupamos términos semejantes.
2x - y - [ - x + 5y] - x + 2y
2x - y + x - 5y - x + 2y
2x + x - x - y - 5y + 2y
2x - 4y <===== factorizamos.
2(x - 2y)