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Simplifying 8r + -1 = 7r + 2 Reorder the terms: -1 + 8r = 7r + 2 Reorder the terms: -1 + 8r = 2 + 7r Solving -1 + 8r = 2 + 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. -1 + 8r + -7r = 2 + 7r + -7r Combine like terms: 8r + -7r = 1r -1 + 1r = 2 + 7r + -7r Combine like terms: 7r + -7r = 0 -1 + 1r = 2 + 0 -1 + 1r = 2 Add '1' to each side of the equation. -1 + 1 + 1r = 2 + 1 Combine like terms: -1 + 1 = 0 0 + 1r = 2 + 1 1r = 2 + 1 Combine like terms: 2 + 1 = 3 1r = 3 Divide each side by '1'. r = 3 Simplifying r = 3
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