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Simplifying 40 + 7.5 = 12.5b Combine like terms: 40 + 7.5 = 47.5 47.5 = 12.5b Solving 47.5 = 12.5b Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '-12.5b' to each side of the equation. 47.5 + -12.5b = 12.5b + -12.5b Combine like terms: 12.5b + -12.5b = 0.0 47.5 + -12.5b = 0.0 Add '-47.5' to each side of the equation. 47.5 + -47.5 + -12.5b = 0.0 + -47.5 Combine like terms: 47.5 + -47.5 = 0.0 0.0 + -12.5b = 0.0 + -47.5 -12.5b = 0.0 + -47.5 Combine like terms: 0.0 + -47.5 = -47.5 -12.5b = -47.5 Divide each side by '-12.5'. b = 3.8 Simplifying b = 3.8
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