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Simplifying 3 + -0.20b = -7 + 0.30b Solving 3 + -0.20b = -7 + 0.30b Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '-0.30b' to each side of the equation. 3 + -0.20b + -0.30b = -7 + 0.30b + -0.30b Combine like terms: -0.20b + -0.30b = -0.5b 3 + -0.5b = -7 + 0.30b + -0.30b Combine like terms: 0.30b + -0.30b = 0.00 3 + -0.5b = -7 + 0.00 3 + -0.5b = -7 Add '-3' to each side of the equation. 3 + -3 + -0.5b = -7 + -3 Combine like terms: 3 + -3 = 0 0 + -0.5b = -7 + -3 -0.5b = -7 + -3 Combine like terms: -7 + -3 = -10 -0.5b = -10 Divide each side by '-0.5'. b = 20 Simplifying b = 20
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