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Simplifying -2(1 + -2a) = -2 + -1a (1 * -2 + -2a * -2) = -2 + -1a (-2 + 4a) = -2 + -1a Add '2' to each side of the equation. -2 + 2 + 4a = -2 + 2 + -1a Combine like terms: -2 + 2 = 0 0 + 4a = -2 + 2 + -1a 4a = -2 + 2 + -1a Combine like terms: -2 + 2 = 0 4a = 0 + -1a 4a = -1a Solving 4a = -1a Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add 'a' to each side of the equation. 4a + a = -1a + a Combine like terms: 4a + a = 5a 5a = -1a + a Combine like terms: -1a + a = 0 5a = 0 Divide each side by '5'. a = 0 Simplifying a = 0
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