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