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22-09-2020
Mathematics

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12 - 9 + 3a - 2a + 6b - 3b + b

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22-09-2020

Answer: a + 4b + 3

Step-by-step explanation: Add or subtract all the numbers with the corresponding variable: -3b + b + 6b = 4b, 3a-2a=a, 12-9=3

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