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Simplifying 9r + -15 = -45 + 3r Reorder the terms: -15 + 9r = -45 + 3r Solving -15 + 9r = -45 + 3r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-3r' to each side of the equation. -15 + 9r + -3r = -45 + 3r + -3r Combine like terms: 9r + -3r = 6r -15 + 6r = -45 + 3r + -3r Combine like terms: 3r + -3r = 0 -15 + 6r = -45 + 0 -15 + 6r = -45 Add '15' to each side of the equation. -15 + 15 + 6r = -45 + 15 Combine like terms: -15 + 15 = 0 0 + 6r = -45 + 15 6r = -45 + 15 Combine like terms: -45 + 15 = -30 6r = -30 Divide each side by '6'. r = -5 Simplifying r = -5
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