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Simplifying -84 = -7r Solving -84 = -7r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '7r' to each side of the equation. -84 + 7r = -7r + 7r Combine like terms: -7r + 7r = 0 -84 + 7r = 0 Add '84' to each side of the equation. -84 + 84 + 7r = 0 + 84 Combine like terms: -84 + 84 = 0 0 + 7r = 0 + 84 7r = 0 + 84 Combine like terms: 0 + 84 = 84 7r = 84 Divide each side by '7'. r = 12 Simplifying r = 12
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