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Simplifying 2a + 4 = a + b Reorder the terms: 4 + 2a = a + b Solving 4 + 2a = a + b Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-1a' to each side of the equation. 4 + 2a + -1a = a + -1a + b Combine like terms: 2a + -1a = 1a 4 + 1a = a + -1a + b Combine like terms: a + -1a = 0 4 + 1a = 0 + b 4 + 1a = b Add '-4' to each side of the equation. 4 + -4 + 1a = -4 + b Combine like terms: 4 + -4 = 0 0 + 1a = -4 + b 1a = -4 + b Divide each side by '1'. a = -4 + b Simplifying a = -4 + b
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