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Simplifying 90 + 2b = 99 + -1b Solving 90 + 2b = 99 + -1b Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add 'b' to each side of the equation. 90 + 2b + b = 99 + -1b + b Combine like terms: 2b + b = 3b 90 + 3b = 99 + -1b + b Combine like terms: -1b + b = 0 90 + 3b = 99 + 0 90 + 3b = 99 Add '-90' to each side of the equation. 90 + -90 + 3b = 99 + -90 Combine like terms: 90 + -90 = 0 0 + 3b = 99 + -90 3b = 99 + -90 Combine like terms: 99 + -90 = 9 3b = 9 Divide each side by '3'. b = 3 Simplifying b = 3
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