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Simplifying -7(8 + -3b) = 49 (8 * -7 + -3b * -7) = 49 (-56 + 21b) = 49 Solving -56 + 21b = 49 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 + 21b = 49 + 56 Combine like terms: -56 + 56 = 0 0 + 21b = 49 + 56 21b = 49 + 56 Combine like terms: 49 + 56 = 105 21b = 105 Divide each side by '21'. b = 5 Simplifying b = 5
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