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Simplifying -2(-1b + -19) = 4(-2b + -18) + -20 Reorder the terms: -2(-19 + -1b) = 4(-2b + -18) + -20 (-19 * -2 + -1b * -2) = 4(-2b + -18) + -20 (38 + 2b) = 4(-2b + -18) + -20 Reorder the terms: 38 + 2b = 4(-18 + -2b) + -20 38 + 2b = (-18 * 4 + -2b * 4) + -20 38 + 2b = (-72 + -8b) + -20 Reorder the terms: 38 + 2b = -72 + -20 + -8b Combine like terms: -72 + -20 = -92 38 + 2b = -92 + -8b Solving 38 + 2b = -92 + -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. 38 + 2b + 8b = -92 + -8b + 8b Combine like terms: 2b + 8b = 10b 38 + 10b = -92 + -8b + 8b Combine like terms: -8b + 8b = 0 38 + 10b = -92 + 0 38 + 10b = -92 Add '-38' to each side of the equation. 38 + -38 + 10b = -92 + -38 Combine like terms: 38 + -38 = 0 0 + 10b = -92 + -38 10b = -92 + -38 Combine like terms: -92 + -38 = -130 10b = -130 Divide each side by '10'. b = -13 Simplifying b = -13
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