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Simplifying 7(r + 2) + -5r = 0 Reorder the terms: 7(2 + r) + -5r = 0 (2 * 7 + r * 7) + -5r = 0 (14 + 7r) + -5r = 0 Combine like terms: 7r + -5r = 2r 14 + 2r = 0 Solving 14 + 2r = 0 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-14' to each side of the equation. 14 + -14 + 2r = 0 + -14 Combine like terms: 14 + -14 = 0 0 + 2r = 0 + -14 2r = 0 + -14 Combine like terms: 0 + -14 = -14 2r = -14 Divide each side by '2'. r = -7 Simplifying r = -7
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