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Simplifying -20 + -2b = -2(4b + 2) + 4b Reorder the terms: -20 + -2b = -2(2 + 4b) + 4b -20 + -2b = (2 * -2 + 4b * -2) + 4b -20 + -2b = (-4 + -8b) + 4b Combine like terms: -8b + 4b = -4b -20 + -2b = -4 + -4b Solving -20 + -2b = -4 + -4b Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '4b' to each side of the equation. -20 + -2b + 4b = -4 + -4b + 4b Combine like terms: -2b + 4b = 2b -20 + 2b = -4 + -4b + 4b Combine like terms: -4b + 4b = 0 -20 + 2b = -4 + 0 -20 + 2b = -4 Add '20' to each side of the equation. -20 + 20 + 2b = -4 + 20 Combine like terms: -20 + 20 = 0 0 + 2b = -4 + 20 2b = -4 + 20 Combine like terms: -4 + 20 = 16 2b = 16 Divide each side by '2'. b = 8 Simplifying b = 8
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