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Simplifying -6(6b + 7) = 138 Reorder the terms: -6(7 + 6b) = 138 (7 * -6 + 6b * -6) = 138 (-42 + -36b) = 138 Solving -42 + -36b = 138 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '42' to each side of the equation. -42 + 42 + -36b = 138 + 42 Combine like terms: -42 + 42 = 0 0 + -36b = 138 + 42 -36b = 138 + 42 Combine like terms: 138 + 42 = 180 -36b = 180 Divide each side by '-36'. b = -5 Simplifying b = -5
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