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Simplifying -27 = -1r + -10 Reorder the terms: -27 = -10 + -1r Solving -27 = -10 + -1r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add 'r' to each side of the equation. -27 + r = -10 + -1r + r Combine like terms: -1r + r = 0 -27 + r = -10 + 0 -27 + r = -10 Add '27' to each side of the equation. -27 + 27 + r = -10 + 27 Combine like terms: -27 + 27 = 0 0 + r = -10 + 27 r = -10 + 27 Combine like terms: -10 + 27 = 17 r = 17 Simplifying r = 17
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