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Simplifying r + 3 = r + 7r + 3 Reorder the terms: 3 + r = r + 7r + 3 Reorder the terms: 3 + r = 3 + r + 7r Combine like terms: r + 7r = 8r 3 + r = 3 + 8r Add '-3' to each side of the equation. 3 + -3 + r = 3 + -3 + 8r Combine like terms: 3 + -3 = 0 0 + r = 3 + -3 + 8r r = 3 + -3 + 8r Combine like terms: 3 + -3 = 0 r = 0 + 8r r = 8r Solving r = 8r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-8r' to each side of the equation. r + -8r = 8r + -8r Combine like terms: r + -8r = -7r -7r = 8r + -8r Combine like terms: 8r + -8r = 0 -7r = 0 Divide each side by '-7'. r = 0 Simplifying r = 0
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