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Simplifying -31 = 7b + -5b Combine like terms: 7b + -5b = 2b -31 = 2b Solving -31 = 2b Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '-2b' to each side of the equation. -31 + -2b = 2b + -2b Combine like terms: 2b + -2b = 0 -31 + -2b = 0 Add '31' to each side of the equation. -31 + 31 + -2b = 0 + 31 Combine like terms: -31 + 31 = 0 0 + -2b = 0 + 31 -2b = 0 + 31 Combine like terms: 0 + 31 = 31 -2b = 31 Divide each side by '-2'. b = -15.5 Simplifying b = -15.5
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