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Simplifying 28 + 3a = -2(6 + a) 28 + 3a = (6 * -2 + a * -2) 28 + 3a = (-12 + -2a) Solving 28 + 3a = -12 + -2a Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '2a' to each side of the equation. 28 + 3a + 2a = -12 + -2a + 2a Combine like terms: 3a + 2a = 5a 28 + 5a = -12 + -2a + 2a Combine like terms: -2a + 2a = 0 28 + 5a = -12 + 0 28 + 5a = -12 Add '-28' to each side of the equation. 28 + -28 + 5a = -12 + -28 Combine like terms: 28 + -28 = 0 0 + 5a = -12 + -28 5a = -12 + -28 Combine like terms: -12 + -28 = -40 5a = -40 Divide each side by '5'. a = -8 Simplifying a = -8
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