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Simplifying 3a + 9 = -1(4a + -3) Reorder the terms: 9 + 3a = -1(4a + -3) Reorder the terms: 9 + 3a = -1(-3 + 4a) 9 + 3a = (-3 * -1 + 4a * -1) 9 + 3a = (3 + -4a) Solving 9 + 3a = 3 + -4a Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '4a' to each side of the equation. 9 + 3a + 4a = 3 + -4a + 4a Combine like terms: 3a + 4a = 7a 9 + 7a = 3 + -4a + 4a Combine like terms: -4a + 4a = 0 9 + 7a = 3 + 0 9 + 7a = 3 Add '-9' to each side of the equation. 9 + -9 + 7a = 3 + -9 Combine like terms: 9 + -9 = 0 0 + 7a = 3 + -9 7a = 3 + -9 Combine like terms: 3 + -9 = -6 7a = -6 Divide each side by '7'. a = -0.8571428571 Simplifying a = -0.8571428571
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