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Simplifying 2cos2x + -5cosx + 10 = 13 Reorder the terms: 10 + -5cosx + 2cos2x = 13 Solving 10 + -5cosx + 2cos2x = 13 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-10' to each side of the equation. 10 + -5cosx + -10 + 2cos2x = 13 + -10 Reorder the terms: 10 + -10 + -5cosx + 2cos2x = 13 + -10 Combine like terms: 10 + -10 = 0 0 + -5cosx + 2cos2x = 13 + -10 -5cosx + 2cos2x = 13 + -10 Combine like terms: 13 + -10 = 3 -5cosx + 2cos2x = 3 Reorder the terms: -3 + -5cosx + 2cos2x = 3 + -3 Combine like terms: 3 + -3 = 0 -3 + -5cosx + 2cos2x = 0 The solution to this equation could not be determined.
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