Respuesta:
3a-1b+3c-2d
Explicación paso a paso:
a - 2b + 3c + 1d
-a + 2b + 1c - 2d
3a - 1b - 1c - 1d
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Respuesta:
3a-1b+3c-2d
Explicación paso a paso:
a - 2b + 3c + 1d
-a + 2b + 1c - 2d
3a - 1b - 1c - 1d
______________
3a-1b+3c-2d