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Simplifying x2 + 20lnx + -400 = 0 Reorder the terms: -400 + 20lnx + x2 = 0 Solving -400 + 20lnx + x2 = 0 Solving for variable 'l'. Move all terms containing l to the left, all other terms to the right. Add '400' to each side of the equation. -400 + 20lnx + 400 + x2 = 0 + 400 Reorder the terms: -400 + 400 + 20lnx + x2 = 0 + 400 Combine like terms: -400 + 400 = 0 0 + 20lnx + x2 = 0 + 400 20lnx + x2 = 0 + 400 Combine like terms: 0 + 400 = 400 20lnx + x2 = 400 Add '-1x2' to each side of the equation. 20lnx + x2 + -1x2 = 400 + -1x2 Combine like terms: x2 + -1x2 = 0 20lnx + 0 = 400 + -1x2 20lnx = 400 + -1x2 Divide each side by '20nx'. l = 20n-1x-1 + -0.05n-1x Simplifying l = 20n-1x-1 + -0.05n-1x
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