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Simplifying 2b + 7(b + -4) = -91 Reorder the terms: 2b + 7(-4 + b) = -91 2b + (-4 * 7 + b * 7) = -91 2b + (-28 + 7b) = -91 Reorder the terms: -28 + 2b + 7b = -91 Combine like terms: 2b + 7b = 9b -28 + 9b = -91 Solving -28 + 9b = -91 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '28' to each side of the equation. -28 + 28 + 9b = -91 + 28 Combine like terms: -28 + 28 = 0 0 + 9b = -91 + 28 9b = -91 + 28 Combine like terms: -91 + 28 = -63 9b = -63 Divide each side by '9'. b = -7 Simplifying b = -7
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