Question
Subtract: $a - 2b - 3c$ from $-2a + 5b - 4c$
✓
Answer
$a - 2b - 3c$ from $-2a + 5b - 4c$
$= -2a + 5b - 4c - (a - 2b - 3c) $
$= -2a + 5b - 4c - 4 + 2b + 3c$
$ = -3a + 7b - c$
$= -2a + 5b - 4c - (a - 2b - 3c) $
$= -2a + 5b - 4c - 4 + 2b + 3c$
$ = -3a + 7b - c$
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