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Simplifying 10r + 10 = 9r Reorder the terms: 10 + 10r = 9r Solving 10 + 10r = 9r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-9r' to each side of the equation. 10 + 10r + -9r = 9r + -9r Combine like terms: 10r + -9r = 1r 10 + 1r = 9r + -9r Combine like terms: 9r + -9r = 0 10 + 1r = 0 Add '-10' to each side of the equation. 10 + -10 + 1r = 0 + -10 Combine like terms: 10 + -10 = 0 0 + 1r = 0 + -10 1r = 0 + -10 Combine like terms: 0 + -10 = -10 1r = -10 Divide each side by '1'. r = -10 Simplifying r = -10
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