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WAEC - Mathematics (2017 - No. 12)

Simplify; 3x - (p - x) - (r - p)
2x - r
2x + r
4x - r
2x - 2p - r

解释

3x - (p - x) - ( r - p)

= 3x - p + x - r + p

= 4x - r

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