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