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Simplifying 4a + 4(a + 3) = 0 Reorder the terms: 4a + 4(3 + a) = 0 4a + (3 * 4 + a * 4) = 0 4a + (12 + 4a) = 0 Reorder the terms: 12 + 4a + 4a = 0 Combine like terms: 4a + 4a = 8a 12 + 8a = 0 Solving 12 + 8a = 0 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-12' to each side of the equation. 12 + -12 + 8a = 0 + -12 Combine like terms: 12 + -12 = 0 0 + 8a = 0 + -12 8a = 0 + -12 Combine like terms: 0 + -12 = -12 8a = -12 Divide each side by '8'. a = -1.5 Simplifying a = -1.5
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