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Question
Subtract:
− 8x − 12y + 17z from x − y − z.
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Solution
(x − y − z) − (− 8x − 12y + 17z)
= x − y − z + 8x + 12y − 17z
= x + 8x + 12y − y − z − 17z
= 9x + 11y − 18z
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