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प्रश्न
Simplify: (x + y – z) + (3x – 5y + 7z) – (14x + 7y – 6z)
उत्तर
(x + y – z) + (3x – 5y + 7z) – (14x – 7y – 6z)
= (x + y – z) + (3x – 5y + 7z) + (–14x – 7y + 6z)
= (x + 3x – 14x) + (y – 5y – 7y) + (– z + 7z + 6z)
= (1 + 3 – 14)x + (1 – 5 – 7)y + (–1 + 7 + 6)z
= –10x – 11y + 12z
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