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Simplifying cos(2x) + 3 = -5cos(x) Remove parenthesis around (2x) cos * 2x + 3 = -5cos(x) Reorder the terms for easier multiplication: 2cos * x + 3 = -5cos(x) Multiply cos * x 2cosx + 3 = -5cos(x) Reorder the terms: 3 + 2cosx = -5cos(x) Multiply cos * x 3 + 2cosx = -5cosx Solving 3 + 2cosx = -5cosx Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '5cosx' to each side of the equation. 3 + 2cosx + 5cosx = -5cosx + 5cosx Combine like terms: 2cosx + 5cosx = 7cosx 3 + 7cosx = -5cosx + 5cosx Combine like terms: -5cosx + 5cosx = 0 3 + 7cosx = 0 Add '-3' to each side of the equation. 3 + -3 + 7cosx = 0 + -3 Combine like terms: 3 + -3 = 0 0 + 7cosx = 0 + -3 7cosx = 0 + -3 Combine like terms: 0 + -3 = -3 7cosx = -3 Divide each side by '7osx'. c = -0.4285714286o-1s-1x-1 Simplifying c = -0.4285714286o-1s-1x-1
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