Question
Add: $7x, -3x, 5x, -x, -2x$
✓
Answer
$7x + (-3x) + 5x + (-x) + (-2x) $
$= 7x - 3x + 5x - x - 2x $
$= 12x - 6x $
$= 6x$
$= 7x - 3x + 5x - x - 2x $
$= 12x - 6x $
$= 6x$
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