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Simplifying 2a + -9 = 0 Reorder the terms: -9 + 2a = 0 Solving -9 + 2a = 0 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + 2a = 0 + 9 Combine like terms: -9 + 9 = 0 0 + 2a = 0 + 9 2a = 0 + 9 Combine like terms: 0 + 9 = 9 2a = 9 Divide each side by '2'. a = 4.5 Simplifying a = 4.5
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