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Simplifying -2a + 11 + 3(a + 3) = 0 Reorder the terms: -2a + 11 + 3(3 + a) = 0 -2a + 11 + (3 * 3 + a * 3) = 0 -2a + 11 + (9 + 3a) = 0 Reorder the terms: 11 + 9 + -2a + 3a = 0 Combine like terms: 11 + 9 = 20 20 + -2a + 3a = 0 Combine like terms: -2a + 3a = 1a 20 + 1a = 0 Solving 20 + 1a = 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 + 1a = 0 + -20 Combine like terms: 20 + -20 = 0 0 + 1a = 0 + -20 1a = 0 + -20 Combine like terms: 0 + -20 = -20 1a = -20 Divide each side by '1'. a = -20 Simplifying a = -20
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