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Simplifying -8(6b + 7) = 21 Reorder the terms: -8(7 + 6b) = 21 (7 * -8 + 6b * -8) = 21 (-56 + -48b) = 21 Solving -56 + -48b = 21 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '56' to each side of the equation. -56 + 56 + -48b = 21 + 56 Combine like terms: -56 + 56 = 0 0 + -48b = 21 + 56 -48b = 21 + 56 Combine like terms: 21 + 56 = 77 -48b = 77 Divide each side by '-48'. b = -1.604166667 Simplifying b = -1.604166667
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