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Simplifying 13a + 9 = 9 Reorder the terms: 9 + 13a = 9 Add '-9' to each side of the equation. 9 + -9 + 13a = 9 + -9 Combine like terms: 9 + -9 = 0 0 + 13a = 9 + -9 13a = 9 + -9 Combine like terms: 9 + -9 = 0 13a = 0 Solving 13a = 0 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Divide each side by '13'. a = 0 Simplifying a = 0
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