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Simplifying 7cos2x + -5 = 5cosx Reorder the terms: -5 + 7cos2x = 5cosx Solving -5 + 7cos2x = 5cosx Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-5cosx' to each side of the equation. -5 + -5cosx + 7cos2x = 5cosx + -5cosx Combine like terms: 5cosx + -5cosx = 0 -5 + -5cosx + 7cos2x = 0 Add '5' to each side of the equation. -5 + -5cosx + 5 + 7cos2x = 0 + 5 Reorder the terms: -5 + 5 + -5cosx + 7cos2x = 0 + 5 Combine like terms: -5 + 5 = 0 0 + -5cosx + 7cos2x = 0 + 5 -5cosx + 7cos2x = 0 + 5 Combine like terms: 0 + 5 = 5 -5cosx + 7cos2x = 5 Reorder the terms: -5 + -5cosx + 7cos2x = 5 + -5 Combine like terms: 5 + -5 = 0 -5 + -5cosx + 7cos2x = 0 The solution to this equation could not be determined.
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