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Simplifying 18r + -84 = 4r Reorder the terms: -84 + 18r = 4r Solving -84 + 18r = 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. -84 + 18r + -4r = 4r + -4r Combine like terms: 18r + -4r = 14r -84 + 14r = 4r + -4r Combine like terms: 4r + -4r = 0 -84 + 14r = 0 Add '84' to each side of the equation. -84 + 84 + 14r = 0 + 84 Combine like terms: -84 + 84 = 0 0 + 14r = 0 + 84 14r = 0 + 84 Combine like terms: 0 + 84 = 84 14r = 84 Divide each side by '14'. r = 6 Simplifying r = 6
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