3x - [5y - {6z - …

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Yogita Ingle 6 years, 8 months ago
3x - [5y - {6z - (4x - 7y) }]
= 3x - [5y - {6z - 4x+ 7y}]
= 3x - [5y - 6z + 4x- 7y ]
= 3x - 5y + 6z - 4x+ 7y
= 3x - 4x - 5y + 7y + 6z
= - x + 2y + 6z
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