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Simplifying 18 + -7r = 5(4r + -2) Reorder the terms: 18 + -7r = 5(-2 + 4r) 18 + -7r = (-2 * 5 + 4r * 5) 18 + -7r = (-10 + 20r) Solving 18 + -7r = -10 + 20r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-20r' to each side of the equation. 18 + -7r + -20r = -10 + 20r + -20r Combine like terms: -7r + -20r = -27r 18 + -27r = -10 + 20r + -20r Combine like terms: 20r + -20r = 0 18 + -27r = -10 + 0 18 + -27r = -10 Add '-18' to each side of the equation. 18 + -18 + -27r = -10 + -18 Combine like terms: 18 + -18 = 0 0 + -27r = -10 + -18 -27r = -10 + -18 Combine like terms: -10 + -18 = -28 -27r = -28 Divide each side by '-27'. r = 1.037037037 Simplifying r = 1.037037037
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