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Simplifying 0 = 7x + -20cos(3x + -5) Reorder the terms: 0 = 7x + -20cos(-5 + 3x) 0 = 7x + (-5 * -20cos + 3x * -20cos) 0 = 7x + (100cos + -60cosx) Reorder the terms: 0 = 100cos + -60cosx + 7x Solving 0 = 100cos + -60cosx + 7x Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-100cos' to each side of the equation. 0 + -100cos = 100cos + -60cosx + -100cos + 7x Remove the zero: -100cos = 100cos + -60cosx + -100cos + 7x Reorder the terms: -100cos = 100cos + -100cos + -60cosx + 7x Combine like terms: 100cos + -100cos = 0 -100cos = 0 + -60cosx + 7x -100cos = -60cosx + 7x Add '60cosx' to each side of the equation. -100cos + 60cosx = -60cosx + 60cosx + 7x Combine like terms: -60cosx + 60cosx = 0 -100cos + 60cosx = 0 + 7x -100cos + 60cosx = 7x Combine like terms: 7x + -7x = 0 -100cos + 60cosx + -7x = 0 The solution to this equation could not be determined.
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