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Simplifying 27 = -4r + -1 Reorder the terms: 27 = -1 + -4r Solving 27 = -1 + -4r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '4r' to each side of the equation. 27 + 4r = -1 + -4r + 4r Combine like terms: -4r + 4r = 0 27 + 4r = -1 + 0 27 + 4r = -1 Add '-27' to each side of the equation. 27 + -27 + 4r = -1 + -27 Combine like terms: 27 + -27 = 0 0 + 4r = -1 + -27 4r = -1 + -27 Combine like terms: -1 + -27 = -28 4r = -28 Divide each side by '4'. r = -7 Simplifying r = -7
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