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Simplifying 7(9 + 7k) = 84 (9 * 7 + 7k * 7) = 84 (63 + 49k) = 84 Solving 63 + 49k = 84 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '-63' to each side of the equation. 63 + -63 + 49k = 84 + -63 Combine like terms: 63 + -63 = 0 0 + 49k = 84 + -63 49k = 84 + -63 Combine like terms: 84 + -63 = 21 49k = 21 Divide each side by '49'. k = 0.4285714286 Simplifying k = 0.4285714286
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