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Mathematics for IGCSE & O level - Algebraic Manipulation (Section 7 - No. 43)
What is the result of simplifying 8x - 3y + 2y - x?
7x - y
7x + y
9x - 5y
9x + 5y
解释
Combine like terms: (8x - x) + (-3y + 2y) = 7x - y
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