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Simplifying -1[b + 8] + 9 = -1 Reorder the terms: -1[8 + b] + 9 = -1 [8 * -1 + b * -1] + 9 = -1 [-8 + -1b] + 9 = -1 Reorder the terms: -8 + 9 + -1b = -1 Combine like terms: -8 + 9 = 1 1 + -1b = -1 Solving 1 + -1b = -1 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + -1b = -1 + -1 Combine like terms: 1 + -1 = 0 0 + -1b = -1 + -1 -1b = -1 + -1 Combine like terms: -1 + -1 = -2 -1b = -2 Divide each side by '-1'. b = 2 Simplifying b = 2
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