Question
Take 5x + 6y − 3z from 3x + 5y − 4z.
✓
Answer
(3x + 5y − 4z) − (5x + 6y − 3z)
= 3x + 5y − 4z − 5x − 6y + 3z
= 3x − 5x + 5y − 6y − 4z + 3z
= − 2x − y − z
= 3x + 5y − 4z − 5x − 6y + 3z
= 3x − 5x + 5y − 6y − 4z + 3z
= − 2x − y − z
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