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Simplifying 4 + 4b + -1(2b + 3) + -1(5b + 9) = 0 Reorder the terms: 4 + 4b + -1(3 + 2b) + -1(5b + 9) = 0 4 + 4b + (3 * -1 + 2b * -1) + -1(5b + 9) = 0 4 + 4b + (-3 + -2b) + -1(5b + 9) = 0 Reorder the terms: 4 + 4b + -3 + -2b + -1(9 + 5b) = 0 4 + 4b + -3 + -2b + (9 * -1 + 5b * -1) = 0 4 + 4b + -3 + -2b + (-9 + -5b) = 0 Reorder the terms: 4 + -3 + -9 + 4b + -2b + -5b = 0 Combine like terms: 4 + -3 = 1 1 + -9 + 4b + -2b + -5b = 0 Combine like terms: 1 + -9 = -8 -8 + 4b + -2b + -5b = 0 Combine like terms: 4b + -2b = 2b -8 + 2b + -5b = 0 Combine like terms: 2b + -5b = -3b -8 + -3b = 0 Solving -8 + -3b = 0 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '8' to each side of the equation. -8 + 8 + -3b = 0 + 8 Combine like terms: -8 + 8 = 0 0 + -3b = 0 + 8 -3b = 0 + 8 Combine like terms: 0 + 8 = 8 -3b = 8 Divide each side by '-3'. b = -2.666666667 Simplifying b = -2.666666667
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