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Simplifying -124 = 7(r + -2) + 4r Reorder the terms: -124 = 7(-2 + r) + 4r -124 = (-2 * 7 + r * 7) + 4r -124 = (-14 + 7r) + 4r Combine like terms: 7r + 4r = 11r -124 = -14 + 11r Solving -124 = -14 + 11r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-11r' to each side of the equation. -124 + -11r = -14 + 11r + -11r Combine like terms: 11r + -11r = 0 -124 + -11r = -14 + 0 -124 + -11r = -14 Add '124' to each side of the equation. -124 + 124 + -11r = -14 + 124 Combine like terms: -124 + 124 = 0 0 + -11r = -14 + 124 -11r = -14 + 124 Combine like terms: -14 + 124 = 110 -11r = 110 Divide each side by '-11'. r = -10 Simplifying r = -10
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