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Simplifying 9r = 8r + 7 Reorder the terms: 9r = 7 + 8r Solving 9r = 7 + 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. 9r + -8r = 7 + 8r + -8r Combine like terms: 9r + -8r = 1r 1r = 7 + 8r + -8r Combine like terms: 8r + -8r = 0 1r = 7 + 0 1r = 7 Divide each side by '1'. r = 7 Simplifying r = 7
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