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Simplifying 280 = -7(8 + 6b) 280 = (8 * -7 + 6b * -7) 280 = (-56 + -42b) Solving 280 = -56 + -42b Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '42b' to each side of the equation. 280 + 42b = -56 + -42b + 42b Combine like terms: -42b + 42b = 0 280 + 42b = -56 + 0 280 + 42b = -56 Add '-280' to each side of the equation. 280 + -280 + 42b = -56 + -280 Combine like terms: 280 + -280 = 0 0 + 42b = -56 + -280 42b = -56 + -280 Combine like terms: -56 + -280 = -336 42b = -336 Divide each side by '42'. b = -8 Simplifying b = -8
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