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Simplifying 7r + 15 = 3r + 3 Reorder the terms: 15 + 7r = 3r + 3 Reorder the terms: 15 + 7r = 3 + 3r Solving 15 + 7r = 3 + 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 + 7r + -3r = 3 + 3r + -3r Combine like terms: 7r + -3r = 4r 15 + 4r = 3 + 3r + -3r Combine like terms: 3r + -3r = 0 15 + 4r = 3 + 0 15 + 4r = 3 Add '-15' to each side of the equation. 15 + -15 + 4r = 3 + -15 Combine like terms: 15 + -15 = 0 0 + 4r = 3 + -15 4r = 3 + -15 Combine like terms: 3 + -15 = -12 4r = -12 Divide each side by '4'. r = -3 Simplifying r = -3
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