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Simplifying 3a = 12 + a Solving 3a = 12 + a 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. 3a + -1a = 12 + a + -1a Combine like terms: 3a + -1a = 2a 2a = 12 + a + -1a Combine like terms: a + -1a = 0 2a = 12 + 0 2a = 12 Divide each side by '2'. a = 6 Simplifying a = 6
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