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Simplifying (20k + 18) + k = 180 Reorder the terms: (18 + 20k) + k = 180 Remove parenthesis around (18 + 20k) 18 + 20k + k = 180 Combine like terms: 20k + k = 21k 18 + 21k = 180 Solving 18 + 21k = 180 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '-18' to each side of the equation. 18 + -18 + 21k = 180 + -18 Combine like terms: 18 + -18 = 0 0 + 21k = 180 + -18 21k = 180 + -18 Combine like terms: 180 + -18 = 162 21k = 162 Divide each side by '21'. k = 7.714285714 Simplifying k = 7.714285714
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