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Simplifying -4(r + 7) = 71 Reorder the terms: -4(7 + r) = 71 (7 * -4 + r * -4) = 71 (-28 + -4r) = 71 Solving -28 + -4r = 71 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 + -4r = 71 + 28 Combine like terms: -28 + 28 = 0 0 + -4r = 71 + 28 -4r = 71 + 28 Combine like terms: 71 + 28 = 99 -4r = 99 Divide each side by '-4'. r = -24.75 Simplifying r = -24.75
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