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Simplifying sec2x + -8tanx + -21 = 0 Reorder the terms: -21 + -8antx + c2esx = 0 Solving -21 + -8antx + c2esx = 0 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '21' to each side of the equation. -21 + -8antx + 21 + c2esx = 0 + 21 Reorder the terms: -21 + 21 + -8antx + c2esx = 0 + 21 Combine like terms: -21 + 21 = 0 0 + -8antx + c2esx = 0 + 21 -8antx + c2esx = 0 + 21 Combine like terms: 0 + 21 = 21 -8antx + c2esx = 21 Add '-1c2esx' to each side of the equation. -8antx + c2esx + -1c2esx = 21 + -1c2esx Combine like terms: c2esx + -1c2esx = 0 -8antx + 0 = 21 + -1c2esx -8antx = 21 + -1c2esx Divide each side by '-8ntx'. a = -2.625n-1t-1x-1 + 0.125c2en-1st-1 Simplifying a = -2.625n-1t-1x-1 + 0.125c2en-1st-1 Reorder the terms: a = 0.125c2en-1st-1 + -2.625n-1t-1x-1
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