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2a + 6b = 24, 3a + b = 20

a + 3b = 12, a = 12 - 3b 3(12-3b) + b = 20 36-9b + b = 20 36-8b = 20 8b = 16 b = 2 2a + 12 = 24 2a = 12 a = 6
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Answered by Ailsa C. Maths tutor
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Answered by Christian S. Maths tutor
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