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Simplifying 4a = a + 9 Reorder the terms: 4a = 9 + a Solving 4a = 9 + 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. 4a + -1a = 9 + a + -1a Combine like terms: 4a + -1a = 3a 3a = 9 + a + -1a Combine like terms: a + -1a = 0 3a = 9 + 0 3a = 9 Divide each side by '3'. a = 3 Simplifying a = 3
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