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प्रश्न
Subtract:
5 − a − 4b + 4c from 5a − 7b + 2c.
योग
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उत्तर
(5a − 7b + 2c) − (5 − a − 4b + 4c)
= 5a − 7b + 2c − 5 + a + 4b − 4c
= 5a + a − 7b + 4b + 2c − 4c − 5
= 6a − 3b − 2c − 5
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