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