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Simplifying -7r + -9 = r + 127 Reorder the terms: -9 + -7r = r + 127 Reorder the terms: -9 + -7r = 127 + r Solving -9 + -7r = 127 + r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-1r' to each side of the equation. -9 + -7r + -1r = 127 + r + -1r Combine like terms: -7r + -1r = -8r -9 + -8r = 127 + r + -1r Combine like terms: r + -1r = 0 -9 + -8r = 127 + 0 -9 + -8r = 127 Add '9' to each side of the equation. -9 + 9 + -8r = 127 + 9 Combine like terms: -9 + 9 = 0 0 + -8r = 127 + 9 -8r = 127 + 9 Combine like terms: 127 + 9 = 136 -8r = 136 Divide each side by '-8'. r = -17 Simplifying r = -17
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