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Simplifying 2 = 21 + b Solving 2 = 21 + b Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '-1b' to each side of the equation. 2 + -1b = 21 + b + -1b Combine like terms: b + -1b = 0 2 + -1b = 21 + 0 2 + -1b = 21 Add '-2' to each side of the equation. 2 + -2 + -1b = 21 + -2 Combine like terms: 2 + -2 = 0 0 + -1b = 21 + -2 -1b = 21 + -2 Combine like terms: 21 + -2 = 19 -1b = 19 Divide each side by '-1'. b = -19 Simplifying b = -19
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