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Simplifying k + 20 = -3k Reorder the terms: 20 + k = -3k Solving 20 + k = -3k Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '3k' to each side of the equation. 20 + k + 3k = -3k + 3k Combine like terms: k + 3k = 4k 20 + 4k = -3k + 3k Combine like terms: -3k + 3k = 0 20 + 4k = 0 Add '-20' to each side of the equation. 20 + -20 + 4k = 0 + -20 Combine like terms: 20 + -20 = 0 0 + 4k = 0 + -20 4k = 0 + -20 Combine like terms: 0 + -20 = -20 4k = -20 Divide each side by '4'. k = -5 Simplifying k = -5
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