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Simplifying 3cos * 2x + cos * x + -4 = 0 Reorder the terms for easier multiplication: 3 * 2cos * x + cos * x + -4 = 0 Multiply 3 * 2 6cos * x + cos * x + -4 = 0 Multiply cos * x 6cosx + cos * x + -4 = 0 Multiply cos * x 6cosx + cosx + -4 = 0 Reorder the terms: -4 + 6cosx + cosx = 0 Combine like terms: 6cosx + cosx = 7cosx -4 + 7cosx = 0 Solving -4 + 7cosx = 0 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + 7cosx = 0 + 4 Combine like terms: -4 + 4 = 0 0 + 7cosx = 0 + 4 7cosx = 0 + 4 Combine like terms: 0 + 4 = 4 7cosx = 4 Divide each side by '7osx'. c = 0.5714285714o-1s-1x-1 Simplifying c = 0.5714285714o-1s-1x-1
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