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Simplifying -2(-6r + -4) + 8r = 128 Reorder the terms: -2(-4 + -6r) + 8r = 128 (-4 * -2 + -6r * -2) + 8r = 128 (8 + 12r) + 8r = 128 Combine like terms: 12r + 8r = 20r 8 + 20r = 128 Solving 8 + 20r = 128 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 + 20r = 128 + -8 Combine like terms: 8 + -8 = 0 0 + 20r = 128 + -8 20r = 128 + -8 Combine like terms: 128 + -8 = 120 20r = 120 Divide each side by '20'. r = 6 Simplifying r = 6
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