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Simplifying 7a + 1 + 4a + 9 = 0 Reorder the terms: 1 + 9 + 7a + 4a = 0 Combine like terms: 1 + 9 = 10 10 + 7a + 4a = 0 Combine like terms: 7a + 4a = 11a 10 + 11a = 0 Solving 10 + 11a = 0 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-10' to each side of the equation. 10 + -10 + 11a = 0 + -10 Combine like terms: 10 + -10 = 0 0 + 11a = 0 + -10 11a = 0 + -10 Combine like terms: 0 + -10 = -10 11a = -10 Divide each side by '11'. a = -0.9090909091 Simplifying a = -0.9090909091
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