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Simplifying a + -2(a + -6) = 3a Reorder the terms: a + -2(-6 + a) = 3a a + (-6 * -2 + a * -2) = 3a a + (12 + -2a) = 3a Reorder the terms: 12 + a + -2a = 3a Combine like terms: a + -2a = -1a 12 + -1a = 3a Solving 12 + -1a = 3a Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-3a' to each side of the equation. 12 + -1a + -3a = 3a + -3a Combine like terms: -1a + -3a = -4a 12 + -4a = 3a + -3a Combine like terms: 3a + -3a = 0 12 + -4a = 0 Add '-12' to each side of the equation. 12 + -12 + -4a = 0 + -12 Combine like terms: 12 + -12 = 0 0 + -4a = 0 + -12 -4a = 0 + -12 Combine like terms: 0 + -12 = -12 -4a = -12 Divide each side by '-4'. a = 3 Simplifying a = 3
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