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9C = 234
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-6(a-3b-9c)
the answer is -9c.
9c
2ab - 6ac + 3b - 9c = 2a(b - 3c) + 3(b - 3c) = (2a + 3)(b - 3c).
2C = $0.48 C = $0.24 9C = $0.24x9 9C = $2.16