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Simplifying 82 = -8r + 90 Reorder the terms: 82 = 90 + -8r Solving 82 = 90 + -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. 82 + 8r = 90 + -8r + 8r Combine like terms: -8r + 8r = 0 82 + 8r = 90 + 0 82 + 8r = 90 Add '-82' to each side of the equation. 82 + -82 + 8r = 90 + -82 Combine like terms: 82 + -82 = 0 0 + 8r = 90 + -82 8r = 90 + -82 Combine like terms: 90 + -82 = 8 8r = 8 Divide each side by '8'. r = 1 Simplifying r = 1
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