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Simplifying 6(-4 + 2r) = -84 (-4 * 6 + 2r * 6) = -84 (-24 + 12r) = -84 Solving -24 + 12r = -84 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '24' to each side of the equation. -24 + 24 + 12r = -84 + 24 Combine like terms: -24 + 24 = 0 0 + 12r = -84 + 24 12r = -84 + 24 Combine like terms: -84 + 24 = -60 12r = -60 Divide each side by '12'. r = -5 Simplifying r = -5
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