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Simplifying -138 = -2 + 8r Solving -138 = -2 + 8r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-8r' to each side of the equation. -138 + -8r = -2 + 8r + -8r Combine like terms: 8r + -8r = 0 -138 + -8r = -2 + 0 -138 + -8r = -2 Add '138' to each side of the equation. -138 + 138 + -8r = -2 + 138 Combine like terms: -138 + 138 = 0 0 + -8r = -2 + 138 -8r = -2 + 138 Combine like terms: -2 + 138 = 136 -8r = 136 Divide each side by '-8'. r = -17 Simplifying r = -17
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