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Simplifying 13 = 4 + 4b + -13 Reorder the terms: 13 = 4 + -13 + 4b Combine like terms: 4 + -13 = -9 13 = -9 + 4b Solving 13 = -9 + 4b Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '-4b' to each side of the equation. 13 + -4b = -9 + 4b + -4b Combine like terms: 4b + -4b = 0 13 + -4b = -9 + 0 13 + -4b = -9 Add '-13' to each side of the equation. 13 + -13 + -4b = -9 + -13 Combine like terms: 13 + -13 = 0 0 + -4b = -9 + -13 -4b = -9 + -13 Combine like terms: -9 + -13 = -22 -4b = -22 Divide each side by '-4'. b = 5.5 Simplifying b = 5.5
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