Question
Subtract: $(x - y + 3z)$ from $(2z - x - 3y)$

Answer

$(x - y + 3z)$ from $(2z - x - 3y)$
$= (2z - x - 3y) - (x - y + 3z)$
$= 2z - x - 3y - x + y - 3z$
$= -x - x - 3y + y + 2z - 3z$
$= -2x - 2y - z$

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