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Simplifying 9a + -4(-5a + -1) = 0 Reorder the terms: 9a + -4(-1 + -5a) = 0 9a + (-1 * -4 + -5a * -4) = 0 9a + (4 + 20a) = 0 Reorder the terms: 4 + 9a + 20a = 0 Combine like terms: 9a + 20a = 29a 4 + 29a = 0 Solving 4 + 29a = 0 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + 29a = 0 + -4 Combine like terms: 4 + -4 = 0 0 + 29a = 0 + -4 29a = 0 + -4 Combine like terms: 0 + -4 = -4 29a = -4 Divide each side by '29'. a = -0.1379310345 Simplifying a = -0.1379310345
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