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Simplifying -8(k + 7) + -7 = -87 Reorder the terms: -8(7 + k) + -7 = -87 (7 * -8 + k * -8) + -7 = -87 (-56 + -8k) + -7 = -87 Reorder the terms: -56 + -7 + -8k = -87 Combine like terms: -56 + -7 = -63 -63 + -8k = -87 Solving -63 + -8k = -87 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 + -8k = -87 + 63 Combine like terms: -63 + 63 = 0 0 + -8k = -87 + 63 -8k = -87 + 63 Combine like terms: -87 + 63 = -24 -8k = -24 Divide each side by '-8'. k = 3 Simplifying k = 3
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