5x - [2y - {3z - (2x -3y + 2z)}]
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5x - [2y - {3z - (2x - 3y - 2z)}]
= 5x - [2y - { 3z - 2x + 3y + 2z}]
= 5x - [2y - {- 2x + 3y + 5z}
= 5x - [2y + 2x - 3y - 5z]
= 5x -[ 2x - y - 5z]
= 5x - 2x + y + 5z
= 3x + y + 5z
hope it helps you!!
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