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Simplifying (13b + -9) + -4(3b + 3) = -2 Reorder the terms: (-9 + 13b) + -4(3b + 3) = -2 Remove parenthesis around (-9 + 13b) -9 + 13b + -4(3b + 3) = -2 Reorder the terms: -9 + 13b + -4(3 + 3b) = -2 -9 + 13b + (3 * -4 + 3b * -4) = -2 -9 + 13b + (-12 + -12b) = -2 Reorder the terms: -9 + -12 + 13b + -12b = -2 Combine like terms: -9 + -12 = -21 -21 + 13b + -12b = -2 Combine like terms: 13b + -12b = 1b -21 + 1b = -2 Solving -21 + 1b = -2 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '21' to each side of the equation. -21 + 21 + 1b = -2 + 21 Combine like terms: -21 + 21 = 0 0 + 1b = -2 + 21 1b = -2 + 21 Combine like terms: -2 + 21 = 19 1b = 19 Divide each side by '1'. b = 19 Simplifying b = 19
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