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Simplifying a + -2 + 2 + 4 = 2a + 4 Reorder the terms: -2 + 2 + 4 + a = 2a + 4 Combine like terms: -2 + 2 = 0 0 + 4 + a = 2a + 4 4 + a = 2a + 4 Reorder the terms: 4 + a = 4 + 2a Add '-4' to each side of the equation. 4 + -4 + a = 4 + -4 + 2a Combine like terms: 4 + -4 = 0 0 + a = 4 + -4 + 2a a = 4 + -4 + 2a Combine like terms: 4 + -4 = 0 a = 0 + 2a a = 2a Solving a = 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. a + -2a = 2a + -2a Combine like terms: a + -2a = -1a -1a = 2a + -2a Combine like terms: 2a + -2a = 0 -1a = 0 Divide each side by '-1'. a = 0 Simplifying a = 0
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