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Simplifying 7a + 8 + 6a + 12 = 0 Reorder the terms: 8 + 12 + 7a + 6a = 0 Combine like terms: 8 + 12 = 20 20 + 7a + 6a = 0 Combine like terms: 7a + 6a = 13a 20 + 13a = 0 Solving 20 + 13a = 0 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-20' to each side of the equation. 20 + -20 + 13a = 0 + -20 Combine like terms: 20 + -20 = 0 0 + 13a = 0 + -20 13a = 0 + -20 Combine like terms: 0 + -20 = -20 13a = -20 Divide each side by '13'. a = -1.538461538 Simplifying a = -1.538461538
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