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Simplifying -7(r + 2) + 3r = 0 Reorder the terms: -7(2 + r) + 3r = 0 (2 * -7 + r * -7) + 3r = 0 (-14 + -7r) + 3r = 0 Combine like terms: -7r + 3r = -4r -14 + -4r = 0 Solving -14 + -4r = 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 + -4r = 0 + 14 Combine like terms: -14 + 14 = 0 0 + -4r = 0 + 14 -4r = 0 + 14 Combine like terms: 0 + 14 = 14 -4r = 14 Divide each side by '-4'. r = -3.5 Simplifying r = -3.5
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