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Simplifying 2(4r + -1) = 8 Reorder the terms: 2(-1 + 4r) = 8 (-1 * 2 + 4r * 2) = 8 (-2 + 8r) = 8 Solving -2 + 8r = 8 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + 8r = 8 + 2 Combine like terms: -2 + 2 = 0 0 + 8r = 8 + 2 8r = 8 + 2 Combine like terms: 8 + 2 = 10 8r = 10 Divide each side by '8'. r = 1.25 Simplifying r = 1.25
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