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Simplifying 5(r + 7) = -55 Reorder the terms: 5(7 + r) = -55 (7 * 5 + r * 5) = -55 (35 + 5r) = -55 Solving 35 + 5r = -55 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-35' to each side of the equation. 35 + -35 + 5r = -55 + -35 Combine like terms: 35 + -35 = 0 0 + 5r = -55 + -35 5r = -55 + -35 Combine like terms: -55 + -35 = -90 5r = -90 Divide each side by '5'. r = -18 Simplifying r = -18
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