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Simplifying 123 = 19r + -15 Reorder the terms: 123 = -15 + 19r Solving 123 = -15 + 19r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-19r' to each side of the equation. 123 + -19r = -15 + 19r + -19r Combine like terms: 19r + -19r = 0 123 + -19r = -15 + 0 123 + -19r = -15 Add '-123' to each side of the equation. 123 + -123 + -19r = -15 + -123 Combine like terms: 123 + -123 = 0 0 + -19r = -15 + -123 -19r = -15 + -123 Combine like terms: -15 + -123 = -138 -19r = -138 Divide each side by '-19'. r = 7.263157895 Simplifying r = 7.263157895
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