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Simplifying 5(1 + 4k) + 1 = 6(1 + 7k) (1 * 5 + 4k * 5) + 1 = 6(1 + 7k) (5 + 20k) + 1 = 6(1 + 7k) Reorder the terms: 5 + 1 + 20k = 6(1 + 7k) Combine like terms: 5 + 1 = 6 6 + 20k = 6(1 + 7k) 6 + 20k = (1 * 6 + 7k * 6) 6 + 20k = (6 + 42k) Add '-6' to each side of the equation. 6 + -6 + 20k = 6 + -6 + 42k Combine like terms: 6 + -6 = 0 0 + 20k = 6 + -6 + 42k 20k = 6 + -6 + 42k Combine like terms: 6 + -6 = 0 20k = 0 + 42k 20k = 42k Solving 20k = 42k Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '-42k' to each side of the equation. 20k + -42k = 42k + -42k Combine like terms: 20k + -42k = -22k -22k = 42k + -42k Combine like terms: 42k + -42k = 0 -22k = 0 Divide each side by '-22'. k = 0 Simplifying k = 0
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