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Simplifying -4(r + 5) = 12 Reorder the terms: -4(5 + r) = 12 (5 * -4 + r * -4) = 12 (-20 + -4r) = 12 Solving -20 + -4r = 12 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '20' to each side of the equation. -20 + 20 + -4r = 12 + 20 Combine like terms: -20 + 20 = 0 0 + -4r = 12 + 20 -4r = 12 + 20 Combine like terms: 12 + 20 = 32 -4r = 32 Divide each side by '-4'. r = -8 Simplifying r = -8
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