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Simplifying -9 + 7r = -5r Solving -9 + 7r = -5r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '5r' to each side of the equation. -9 + 7r + 5r = -5r + 5r Combine like terms: 7r + 5r = 12r -9 + 12r = -5r + 5r Combine like terms: -5r + 5r = 0 -9 + 12r = 0 Add '9' to each side of the equation. -9 + 9 + 12r = 0 + 9 Combine like terms: -9 + 9 = 0 0 + 12r = 0 + 9 12r = 0 + 9 Combine like terms: 0 + 9 = 9 12r = 9 Divide each side by '12'. r = 0.75 Simplifying r = 0.75
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