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Simplifying 109 = -2(8a + -2) + a Reorder the terms: 109 = -2(-2 + 8a) + a 109 = (-2 * -2 + 8a * -2) + a 109 = (4 + -16a) + a Combine like terms: -16a + a = -15a 109 = 4 + -15a Solving 109 = 4 + -15a Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '15a' to each side of the equation. 109 + 15a = 4 + -15a + 15a Combine like terms: -15a + 15a = 0 109 + 15a = 4 + 0 109 + 15a = 4 Add '-109' to each side of the equation. 109 + -109 + 15a = 4 + -109 Combine like terms: 109 + -109 = 0 0 + 15a = 4 + -109 15a = 4 + -109 Combine like terms: 4 + -109 = -105 15a = -105 Divide each side by '15'. a = -7 Simplifying a = -7
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