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Simplifying 2r + -8 + 5r = 10 + r Reorder the terms: -8 + 2r + 5r = 10 + r Combine like terms: 2r + 5r = 7r -8 + 7r = 10 + r Solving -8 + 7r = 10 + 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. -8 + 7r + -1r = 10 + r + -1r Combine like terms: 7r + -1r = 6r -8 + 6r = 10 + r + -1r Combine like terms: r + -1r = 0 -8 + 6r = 10 + 0 -8 + 6r = 10 Add '8' to each side of the equation. -8 + 8 + 6r = 10 + 8 Combine like terms: -8 + 8 = 0 0 + 6r = 10 + 8 6r = 10 + 8 Combine like terms: 10 + 8 = 18 6r = 18 Divide each side by '6'. r = 3 Simplifying r = 3
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