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Simplifying -18r + 3r = 4r + 56 Combine like terms: -18r + 3r = -15r -15r = 4r + 56 Reorder the terms: -15r = 56 + 4r Solving -15r = 56 + 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. -15r + -4r = 56 + 4r + -4r Combine like terms: -15r + -4r = -19r -19r = 56 + 4r + -4r Combine like terms: 4r + -4r = 0 -19r = 56 + 0 -19r = 56 Divide each side by '-19'. r = -2.947368421 Simplifying r = -2.947368421

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