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Simplifying 49 = 21 + b Solving 49 = 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. 49 + -1b = 21 + b + -1b Combine like terms: b + -1b = 0 49 + -1b = 21 + 0 49 + -1b = 21 Add '-49' to each side of the equation. 49 + -49 + -1b = 21 + -49 Combine like terms: 49 + -49 = 0 0 + -1b = 21 + -49 -1b = 21 + -49 Combine like terms: 21 + -49 = -28 -1b = -28 Divide each side by '-1'. b = 28 Simplifying b = 28
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