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Simplifying -13 + -1b = -1(-3 + -7b) -13 + -1b = (-3 * -1 + -7b * -1) -13 + -1b = (3 + 7b) Solving -13 + -1b = 3 + 7b Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '-7b' to each side of the equation. -13 + -1b + -7b = 3 + 7b + -7b Combine like terms: -1b + -7b = -8b -13 + -8b = 3 + 7b + -7b Combine like terms: 7b + -7b = 0 -13 + -8b = 3 + 0 -13 + -8b = 3 Add '13' to each side of the equation. -13 + 13 + -8b = 3 + 13 Combine like terms: -13 + 13 = 0 0 + -8b = 3 + 13 -8b = 3 + 13 Combine like terms: 3 + 13 = 16 -8b = 16 Divide each side by '-8'. b = -2 Simplifying b = -2
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