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Simplifying (-4r)(-30) + -1(-8) * r = 8 Remove parenthesis around (-4r) -4r(-30) + -1(-8) * r = 8 Reorder the terms for easier multiplication: -4 * -30r + -1(-8) * r = 8 Multiply -4 * -30 120r + -1(-8) * r = 8 Multiply -1 * -8 120r + 8r = 8 Combine like terms: 120r + 8r = 128r 128r = 8 Solving 128r = 8 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Divide each side by '128'. r = 0.0625 Simplifying r = 0.0625
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