Mathematics · Algebra

If a2 + 49b2 + c2 + 18 = 2(28b - c - a), then the value of (a + 7b - c) is:

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If a2 + 49b2 + c2 + 18 = 2(28b - c - a), then the value of (a + 7b - c) is:

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If a2 + 49b2 + c2 + 18 = 2(28b - c - a), then the value of (a + 7b - c) is:

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