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Simplifying (68 + -2k) + 47 = 990 Remove parenthesis around (68 + -2k) 68 + -2k + 47 = 990 Reorder the terms: 68 + 47 + -2k = 990 Combine like terms: 68 + 47 = 115 115 + -2k = 990 Solving 115 + -2k = 990 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '-115' to each side of the equation. 115 + -115 + -2k = 990 + -115 Combine like terms: 115 + -115 = 0 0 + -2k = 990 + -115 -2k = 990 + -115 Combine like terms: 990 + -115 = 875 -2k = 875 Divide each side by '-2'. k = -437.5 Simplifying k = -437.5
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