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Simplifying -7(3r + 4) = 14 Reorder the terms: -7(4 + 3r) = 14 (4 * -7 + 3r * -7) = 14 (-28 + -21r) = 14 Solving -28 + -21r = 14 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '28' to each side of the equation. -28 + 28 + -21r = 14 + 28 Combine like terms: -28 + 28 = 0 0 + -21r = 14 + 28 -21r = 14 + 28 Combine like terms: 14 + 28 = 42 -21r = 42 Divide each side by '-21'. r = -2 Simplifying r = -2
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