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Simplifying -5(2k + 2) = -80 Reorder the terms: -5(2 + 2k) = -80 (2 * -5 + 2k * -5) = -80 (-10 + -10k) = -80 Solving -10 + -10k = -80 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '10' to each side of the equation. -10 + 10 + -10k = -80 + 10 Combine like terms: -10 + 10 = 0 0 + -10k = -80 + 10 -10k = -80 + 10 Combine like terms: -80 + 10 = -70 -10k = -70 Divide each side by '-10'. k = 7 Simplifying k = 7
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