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Simplifying -3cos(2x) + -7cos(X) + -5 = -7 Remove parenthesis around (2x) -3cos * 2x + -7cos(X) + -5 = -7 Reorder the terms for easier multiplication: -3 * 2cos * x + -7cos(X) + -5 = -7 Multiply -3 * 2 -6cos * x + -7cos(X) + -5 = -7 Multiply cos * x -6cosx + -7cos(X) + -5 = -7 Multiply cos * X -6cosx + -7cosX + -5 = -7 Reorder the terms: -5 + -7cosX + -6cosx = -7 Solving -5 + -7cosX + -6cosx = -7 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '5' to each side of the equation. -5 + -7cosX + 5 + -6cosx = -7 + 5 Reorder the terms: -5 + 5 + -7cosX + -6cosx = -7 + 5 Combine like terms: -5 + 5 = 0 0 + -7cosX + -6cosx = -7 + 5 -7cosX + -6cosx = -7 + 5 Combine like terms: -7 + 5 = -2 -7cosX + -6cosx = -2 Reorder the terms: 2 + -7cosX + -6cosx = -2 + 2 Combine like terms: -2 + 2 = 0 2 + -7cosX + -6cosx = 0 The solution to this equation could not be determined.
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