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Simplifying 9cosx + -1 = 7cosx Reorder the terms: -1 + 9cosx = 7cosx Solving -1 + 9cosx = 7cosx Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-7cosx' to each side of the equation. -1 + 9cosx + -7cosx = 7cosx + -7cosx Combine like terms: 9cosx + -7cosx = 2cosx -1 + 2cosx = 7cosx + -7cosx Combine like terms: 7cosx + -7cosx = 0 -1 + 2cosx = 0 Add '1' to each side of the equation. -1 + 1 + 2cosx = 0 + 1 Combine like terms: -1 + 1 = 0 0 + 2cosx = 0 + 1 2cosx = 0 + 1 Combine like terms: 0 + 1 = 1 2cosx = 1 Divide each side by '2osx'. c = 0.5o-1s-1x-1 Simplifying c = 0.5o-1s-1x-1
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