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Simplifying 7 + 0.8b = 0.9b Solving 7 + 0.8b = 0.9b Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '-0.9b' to each side of the equation. 7 + 0.8b + -0.9b = 0.9b + -0.9b Combine like terms: 0.8b + -0.9b = -0.1b 7 + -0.1b = 0.9b + -0.9b Combine like terms: 0.9b + -0.9b = 0.0 7 + -0.1b = 0.0 Add '-7' to each side of the equation. 7 + -7 + -0.1b = 0.0 + -7 Combine like terms: 7 + -7 = 0 0 + -0.1b = 0.0 + -7 -0.1b = 0.0 + -7 Combine like terms: 0.0 + -7 = -7 -0.1b = -7 Divide each side by '-0.1'. b = 70 Simplifying b = 70
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