Question
How much less than $x - 2y + 3z$ is $2x - 4y - z$?
✓
Answer
$= (x - 2y + 3z) - (2x - 4y - z)$
$= x - 2y + 3z - 2x + 4y + z$
$= -x + 2y + 4z$
$= x - 2y + 3z - 2x + 4y + z$
$= -x + 2y + 4z$
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