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Simplifying 7(3k + -7) = 0 Reorder the terms: 7(-7 + 3k) = 0 (-7 * 7 + 3k * 7) = 0 (-49 + 21k) = 0 Solving -49 + 21k = 0 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '49' to each side of the equation. -49 + 49 + 21k = 0 + 49 Combine like terms: -49 + 49 = 0 0 + 21k = 0 + 49 21k = 0 + 49 Combine like terms: 0 + 49 = 49 21k = 49 Divide each side by '21'. k = 2.333333333 Simplifying k = 2.333333333
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