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Simplifying (7b + -7) + -2(3b + 4) = -3 Reorder the terms: (-7 + 7b) + -2(3b + 4) = -3 Remove parenthesis around (-7 + 7b) -7 + 7b + -2(3b + 4) = -3 Reorder the terms: -7 + 7b + -2(4 + 3b) = -3 -7 + 7b + (4 * -2 + 3b * -2) = -3 -7 + 7b + (-8 + -6b) = -3 Reorder the terms: -7 + -8 + 7b + -6b = -3 Combine like terms: -7 + -8 = -15 -15 + 7b + -6b = -3 Combine like terms: 7b + -6b = 1b -15 + 1b = -3 Solving -15 + 1b = -3 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '15' to each side of the equation. -15 + 15 + 1b = -3 + 15 Combine like terms: -15 + 15 = 0 0 + 1b = -3 + 15 1b = -3 + 15 Combine like terms: -3 + 15 = 12 1b = 12 Divide each side by '1'. b = 12 Simplifying b = 12
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