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Simplifying -5(-7r + -8) = -30 Reorder the terms: -5(-8 + -7r) = -30 (-8 * -5 + -7r * -5) = -30 (40 + 35r) = -30 Solving 40 + 35r = -30 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-40' to each side of the equation. 40 + -40 + 35r = -30 + -40 Combine like terms: 40 + -40 = 0 0 + 35r = -30 + -40 35r = -30 + -40 Combine like terms: -30 + -40 = -70 35r = -70 Divide each side by '35'. r = -2 Simplifying r = -2
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