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Simplifying 8r + 10 = 15 + 7r Reorder the terms: 10 + 8r = 15 + 7r Solving 10 + 8r = 15 + 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. 10 + 8r + -7r = 15 + 7r + -7r Combine like terms: 8r + -7r = 1r 10 + 1r = 15 + 7r + -7r Combine like terms: 7r + -7r = 0 10 + 1r = 15 + 0 10 + 1r = 15 Add '-10' to each side of the equation. 10 + -10 + 1r = 15 + -10 Combine like terms: 10 + -10 = 0 0 + 1r = 15 + -10 1r = 15 + -10 Combine like terms: 15 + -10 = 5 1r = 5 Divide each side by '1'. r = 5 Simplifying r = 5
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