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Simplifying 4 + 12a = -2(7 + -4a) 4 + 12a = (7 * -2 + -4a * -2) 4 + 12a = (-14 + 8a) Solving 4 + 12a = -14 + 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 = -14 + 8a + -8a Combine like terms: 12a + -8a = 4a 4 + 4a = -14 + 8a + -8a Combine like terms: 8a + -8a = 0 4 + 4a = -14 + 0 4 + 4a = -14 Add '-4' to each side of the equation. 4 + -4 + 4a = -14 + -4 Combine like terms: 4 + -4 = 0 0 + 4a = -14 + -4 4a = -14 + -4 Combine like terms: -14 + -4 = -18 4a = -18 Divide each side by '4'. a = -4.5 Simplifying a = -4.5
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