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Simplifying 4 + 12a = 2(6 + -4a) 4 + 12a = (6 * 2 + -4a * 2) 4 + 12a = (12 + -8a) Solving 4 + 12a = 12 + -8a Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '8a' to each side of the equation. 4 + 12a + 8a = 12 + -8a + 8a Combine like terms: 12a + 8a = 20a 4 + 20a = 12 + -8a + 8a Combine like terms: -8a + 8a = 0 4 + 20a = 12 + 0 4 + 20a = 12 Add '-4' to each side of the equation. 4 + -4 + 20a = 12 + -4 Combine like terms: 4 + -4 = 0 0 + 20a = 12 + -4 20a = 12 + -4 Combine like terms: 12 + -4 = 8 20a = 8 Divide each side by '20'. a = 0.4 Simplifying a = 0.4
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