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Simplifying cos2x + -0.8cosx + -153 = 0 Reorder the terms: -153 + -0.8cosx + cos2x = 0 Solving -153 + -0.8cosx + cos2x = 0 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '153' to each side of the equation. -153 + -0.8cosx + 153 + cos2x = 0 + 153 Reorder the terms: -153 + 153 + -0.8cosx + cos2x = 0 + 153 Combine like terms: -153 + 153 = 0 0 + -0.8cosx + cos2x = 0 + 153 -0.8cosx + cos2x = 0 + 153 Combine like terms: 0 + 153 = 153 -0.8cosx + cos2x = 153 Reorder the terms: -153 + -0.8cosx + cos2x = 153 + -153 Combine like terms: 153 + -153 = 0 -153 + -0.8cosx + cos2x = 0 The solution to this equation could not be determined.
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