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Simplifying 2(5r + 5) = (3r + -1) Reorder the terms: 2(5 + 5r) = (3r + -1) (5 * 2 + 5r * 2) = (3r + -1) (10 + 10r) = (3r + -1) Reorder the terms: 10 + 10r = (-1 + 3r) Remove parenthesis around (-1 + 3r) 10 + 10r = -1 + 3r Solving 10 + 10r = -1 + 3r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-3r' to each side of the equation. 10 + 10r + -3r = -1 + 3r + -3r Combine like terms: 10r + -3r = 7r 10 + 7r = -1 + 3r + -3r Combine like terms: 3r + -3r = 0 10 + 7r = -1 + 0 10 + 7r = -1 Add '-10' to each side of the equation. 10 + -10 + 7r = -1 + -10 Combine like terms: 10 + -10 = 0 0 + 7r = -1 + -10 7r = -1 + -10 Combine like terms: -1 + -10 = -11 7r = -11 Divide each side by '7'. r = -1.571428571 Simplifying r = -1.571428571
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