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Simplifying 7cos(x) + 9 = -2cos(x) Multiply cos * x 7cosx + 9 = -2cos(x) Reorder the terms: 9 + 7cosx = -2cos(x) Multiply cos * x 9 + 7cosx = -2cosx Solving 9 + 7cosx = -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. 9 + 7cosx + 2cosx = -2cosx + 2cosx Combine like terms: 7cosx + 2cosx = 9cosx 9 + 9cosx = -2cosx + 2cosx Combine like terms: -2cosx + 2cosx = 0 9 + 9cosx = 0 Add '-9' to each side of the equation. 9 + -9 + 9cosx = 0 + -9 Combine like terms: 9 + -9 = 0 0 + 9cosx = 0 + -9 9cosx = 0 + -9 Combine like terms: 0 + -9 = -9 9cosx = -9 Divide each side by '9osx'. c = -1o-1s-1x-1 Simplifying c = -1o-1s-1x-1
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