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Simplifying 4 + 18r + -1 = 9r + 51 + -7r Reorder the terms: 4 + -1 + 18r = 9r + 51 + -7r Combine like terms: 4 + -1 = 3 3 + 18r = 9r + 51 + -7r Reorder the terms: 3 + 18r = 51 + 9r + -7r Combine like terms: 9r + -7r = 2r 3 + 18r = 51 + 2r Solving 3 + 18r = 51 + 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. 3 + 18r + -2r = 51 + 2r + -2r Combine like terms: 18r + -2r = 16r 3 + 16r = 51 + 2r + -2r Combine like terms: 2r + -2r = 0 3 + 16r = 51 + 0 3 + 16r = 51 Add '-3' to each side of the equation. 3 + -3 + 16r = 51 + -3 Combine like terms: 3 + -3 = 0 0 + 16r = 51 + -3 16r = 51 + -3 Combine like terms: 51 + -3 = 48 16r = 48 Divide each side by '16'. r = 3 Simplifying r = 3
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