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Simplifying R + 9 + 7r = 4(3 + 2r) + -3 Reorder the terms: 9 + R + 7r = 4(3 + 2r) + -3 9 + R + 7r = (3 * 4 + 2r * 4) + -3 9 + R + 7r = (12 + 8r) + -3 Reorder the terms: 9 + R + 7r = 12 + -3 + 8r Combine like terms: 12 + -3 = 9 9 + R + 7r = 9 + 8r Add '-9' to each side of the equation. 9 + R + -9 + 7r = 9 + -9 + 8r Reorder the terms: 9 + -9 + R + 7r = 9 + -9 + 8r Combine like terms: 9 + -9 = 0 0 + R + 7r = 9 + -9 + 8r R + 7r = 9 + -9 + 8r Combine like terms: 9 + -9 = 0 R + 7r = 0 + 8r R + 7r = 8r Solving R + 7r = 8r Solving for variable 'R'. Move all terms containing R to the left, all other terms to the right. Add '-7r' to each side of the equation. R + 7r + -7r = 8r + -7r Combine like terms: 7r + -7r = 0 R + 0 = 8r + -7r R = 8r + -7r Combine like terms: 8r + -7r = 1r R = 1r Simplifying R = 1r
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