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Simplifying 7r + 3 = 3r + 9 Reorder the terms: 3 + 7r = 3r + 9 Reorder the terms: 3 + 7r = 9 + 3r Solving 3 + 7r = 9 + 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. 3 + 7r + -3r = 9 + 3r + -3r Combine like terms: 7r + -3r = 4r 3 + 4r = 9 + 3r + -3r Combine like terms: 3r + -3r = 0 3 + 4r = 9 + 0 3 + 4r = 9 Add '-3' to each side of the equation. 3 + -3 + 4r = 9 + -3 Combine like terms: 3 + -3 = 0 0 + 4r = 9 + -3 4r = 9 + -3 Combine like terms: 9 + -3 = 6 4r = 6 Divide each side by '4'. r = 1.5 Simplifying r = 1.5
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