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Simplifying 2k + 8 + -1r = -7 Reorder the terms: 8 + 2k + -1r = -7 Solving 8 + 2k + -1r = -7 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + 2k + -8 + -1r = -7 + -8 Reorder the terms: 8 + -8 + 2k + -1r = -7 + -8 Combine like terms: 8 + -8 = 0 0 + 2k + -1r = -7 + -8 2k + -1r = -7 + -8 Combine like terms: -7 + -8 = -15 2k + -1r = -15 Add 'r' to each side of the equation. 2k + -1r + r = -15 + r Combine like terms: -1r + r = 0 2k + 0 = -15 + r 2k = -15 + r Divide each side by '2'. k = -7.5 + 0.5r Simplifying k = -7.5 + 0.5r
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