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Simplifying -15b + 21 + 5b = -19 Reorder the terms: 21 + -15b + 5b = -19 Combine like terms: -15b + 5b = -10b 21 + -10b = -19 Solving 21 + -10b = -19 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '-21' to each side of the equation. 21 + -21 + -10b = -19 + -21 Combine like terms: 21 + -21 = 0 0 + -10b = -19 + -21 -10b = -19 + -21 Combine like terms: -19 + -21 = -40 -10b = -40 Divide each side by '-10'. b = 4 Simplifying b = 4
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