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Simplifying 18r + 17 = 157 + -2r Reorder the terms: 17 + 18r = 157 + -2r Solving 17 + 18r = 157 + -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. 17 + 18r + 2r = 157 + -2r + 2r Combine like terms: 18r + 2r = 20r 17 + 20r = 157 + -2r + 2r Combine like terms: -2r + 2r = 0 17 + 20r = 157 + 0 17 + 20r = 157 Add '-17' to each side of the equation. 17 + -17 + 20r = 157 + -17 Combine like terms: 17 + -17 = 0 0 + 20r = 157 + -17 20r = 157 + -17 Combine like terms: 157 + -17 = 140 20r = 140 Divide each side by '20'. r = 7 Simplifying r = 7
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