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Simplifying 21 = -2 + 8(b + 3) Reorder the terms: 21 = -2 + 8(3 + b) 21 = -2 + (3 * 8 + b * 8) 21 = -2 + (24 + 8b) Combine like terms: -2 + 24 = 22 21 = 22 + 8b Solving 21 = 22 + 8b Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '-8b' to each side of the equation. 21 + -8b = 22 + 8b + -8b Combine like terms: 8b + -8b = 0 21 + -8b = 22 + 0 21 + -8b = 22 Add '-21' to each side of the equation. 21 + -21 + -8b = 22 + -21 Combine like terms: 21 + -21 = 0 0 + -8b = 22 + -21 -8b = 22 + -21 Combine like terms: 22 + -21 = 1 -8b = 1 Divide each side by '-8'. b = -0.125 Simplifying b = -0.125
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