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Simplifying -4(r + 2) = -42 Reorder the terms: -4(2 + r) = -42 (2 * -4 + r * -4) = -42 (-8 + -4r) = -42 Solving -8 + -4r = -42 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '8' to each side of the equation. -8 + 8 + -4r = -42 + 8 Combine like terms: -8 + 8 = 0 0 + -4r = -42 + 8 -4r = -42 + 8 Combine like terms: -42 + 8 = -34 -4r = -34 Divide each side by '-4'. r = 8.5 Simplifying r = 8.5
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