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Simplifying 2(a + 4) * 2 = 12 Reorder the terms: 2(4 + a) * 2 = 12 Reorder the terms for easier multiplication: 2 * 2(4 + a) = 12 Multiply 2 * 2 4(4 + a) = 12 (4 * 4 + a * 4) = 12 (16 + 4a) = 12 Solving 16 + 4a = 12 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-16' to each side of the equation. 16 + -16 + 4a = 12 + -16 Combine like terms: 16 + -16 = 0 0 + 4a = 12 + -16 4a = 12 + -16 Combine like terms: 12 + -16 = -4 4a = -4 Divide each side by '4'. a = -1 Simplifying a = -1
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