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Simplifying 7cos2x + cosx + -8 = 0 Reorder the terms: -8 + cosx + 7cos2x = 0 Solving -8 + cosx + 7cos2x = 0 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '8' to each side of the equation. -8 + cosx + 8 + 7cos2x = 0 + 8 Reorder the terms: -8 + 8 + cosx + 7cos2x = 0 + 8 Combine like terms: -8 + 8 = 0 0 + cosx + 7cos2x = 0 + 8 cosx + 7cos2x = 0 + 8 Combine like terms: 0 + 8 = 8 cosx + 7cos2x = 8 Reorder the terms: -8 + cosx + 7cos2x = 8 + -8 Combine like terms: 8 + -8 = 0 -8 + cosx + 7cos2x = 0 The solution to this equation could not be determined.
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