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Simplifying -2(r + 7) = 0 Reorder the terms: -2(7 + r) = 0 (7 * -2 + r * -2) = 0 (-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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