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Mathematics for IGCSE & O level - Algebraic Manipulation (Section 5 - No. 49)

What is 3a + 2b - a + b equal to?
2a + 3b
4a + 3b
2a + b
4a + b

Explanation

Combining like terms (3a - a) + (2b + b) = 2a + 3b

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