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Simplifying (8a + 2) + (8a + 2) + (7a + 9) + 4a = 0 Reorder the terms: (2 + 8a) + (8a + 2) + (7a + 9) + 4a = 0 Remove parenthesis around (2 + 8a) 2 + 8a + (8a + 2) + (7a + 9) + 4a = 0 Reorder the terms: 2 + 8a + (2 + 8a) + (7a + 9) + 4a = 0 Remove parenthesis around (2 + 8a) 2 + 8a + 2 + 8a + (7a + 9) + 4a = 0 Reorder the terms: 2 + 8a + 2 + 8a + (9 + 7a) + 4a = 0 Remove parenthesis around (9 + 7a) 2 + 8a + 2 + 8a + 9 + 7a + 4a = 0 Reorder the terms: 2 + 2 + 9 + 8a + 8a + 7a + 4a = 0 Combine like terms: 2 + 2 = 4 4 + 9 + 8a + 8a + 7a + 4a = 0 Combine like terms: 4 + 9 = 13 13 + 8a + 8a + 7a + 4a = 0 Combine like terms: 8a + 8a = 16a 13 + 16a + 7a + 4a = 0 Combine like terms: 16a + 7a = 23a 13 + 23a + 4a = 0 Combine like terms: 23a + 4a = 27a 13 + 27a = 0 Solving 13 + 27a = 0 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-13' to each side of the equation. 13 + -13 + 27a = 0 + -13 Combine like terms: 13 + -13 = 0 0 + 27a = 0 + -13 27a = 0 + -13 Combine like terms: 0 + -13 = -13 27a = -13 Divide each side by '27'. a = -0.4814814815 Simplifying a = -0.4814814815
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