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Simplifying -144 = -21k Solving -144 = -21k Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '21k' to each side of the equation. -144 + 21k = -21k + 21k Combine like terms: -21k + 21k = 0 -144 + 21k = 0 Add '144' to each side of the equation. -144 + 144 + 21k = 0 + 144 Combine like terms: -144 + 144 = 0 0 + 21k = 0 + 144 21k = 0 + 144 Combine like terms: 0 + 144 = 144 21k = 144 Divide each side by '21'. k = 6.857142857 Simplifying k = 6.857142857
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