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Simplifying -45 = -9r Solving -45 = -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. -45 + 9r = -9r + 9r Combine like terms: -9r + 9r = 0 -45 + 9r = 0 Add '45' to each side of the equation. -45 + 45 + 9r = 0 + 45 Combine like terms: -45 + 45 = 0 0 + 9r = 0 + 45 9r = 0 + 45 Combine like terms: 0 + 45 = 45 9r = 45 Divide each side by '9'. r = 5 Simplifying r = 5
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