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Simplifying 20(1 + 3b) = -20 (1 * 20 + 3b * 20) = -20 (20 + 60b) = -20 Solving 20 + 60b = -20 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '-20' to each side of the equation. 20 + -20 + 60b = -20 + -20 Combine like terms: 20 + -20 = 0 0 + 60b = -20 + -20 60b = -20 + -20 Combine like terms: -20 + -20 = -40 60b = -40 Divide each side by '60'. b = -0.6666666667 Simplifying b = -0.6666666667
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