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Simplifying -1x2 + -1(k + -7) = 0 Reorder the terms: -1x2 + -1(-7 + k) = 0 -1x2 + (-7 * -1 + k * -1) = 0 -1x2 + (7 + -1k) = 0 Reorder the terms: 7 + -1k + -1x2 = 0 Solving 7 + -1k + -1x2 = 0 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -1k + -7 + -1x2 = 0 + -7 Reorder the terms: 7 + -7 + -1k + -1x2 = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -1k + -1x2 = 0 + -7 -1k + -1x2 = 0 + -7 Combine like terms: 0 + -7 = -7 -1k + -1x2 = -7 Add 'x2' to each side of the equation. -1k + -1x2 + x2 = -7 + x2 Combine like terms: -1x2 + x2 = 0 -1k + 0 = -7 + x2 -1k = -7 + x2 Divide each side by '-1'. k = 7 + -1x2 Simplifying k = 7 + -1x2
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