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Simplifying 3r + -15 = 45 + -2r Reorder the terms: -15 + 3r = 45 + -2r Solving -15 + 3r = 45 + -2r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '2r' to each side of the equation. -15 + 3r + 2r = 45 + -2r + 2r Combine like terms: 3r + 2r = 5r -15 + 5r = 45 + -2r + 2r Combine like terms: -2r + 2r = 0 -15 + 5r = 45 + 0 -15 + 5r = 45 Add '15' to each side of the equation. -15 + 15 + 5r = 45 + 15 Combine like terms: -15 + 15 = 0 0 + 5r = 45 + 15 5r = 45 + 15 Combine like terms: 45 + 15 = 60 5r = 60 Divide each side by '5'. r = 12 Simplifying r = 12
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