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Simplifying 8r + -2 = 12 + r Reorder the terms: -2 + 8r = 12 + r Solving -2 + 8r = 12 + r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-1r' to each side of the equation. -2 + 8r + -1r = 12 + r + -1r Combine like terms: 8r + -1r = 7r -2 + 7r = 12 + r + -1r Combine like terms: r + -1r = 0 -2 + 7r = 12 + 0 -2 + 7r = 12 Add '2' to each side of the equation. -2 + 2 + 7r = 12 + 2 Combine like terms: -2 + 2 = 0 0 + 7r = 12 + 2 7r = 12 + 2 Combine like terms: 12 + 2 = 14 7r = 14 Divide each side by '7'. r = 2 Simplifying r = 2
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